プリンピキア

第8章周期関数Periodic Functions

Answer Key解答

Solution 1解答 1

6π

Solution 2解答 2

1 2 compressed

1 2、縮む

Solution 3解答 3

π 2 ; right

π 2 ;

Solution 4解答 4

2 units up

上に2単位

Solution 5解答 5

midline: y=0; amplitude: | A |=1 2 ; period: P=2π | B | =6π; phase shift: C B =π

中央線: y=0;、振幅: | A |=1 2 ;、周期: P=2π | B | =6π;、位相のずれ: C B =π

Solution 6解答 6

f( x )=sin(x)+2

Solution 7解答 7

two possibilities: y=4sin( π 5 xπ 5 )+4 or y=4sin( π 5 x+4π 5 )+4

二通りありうる: y=4sin( π 5 xπ 5 )+4 または y=4sin( π 5 x+4π 5 )+4

Solution 8解答 8

A graph of -0.8cos(2x). Graph has range of [-0.8, 0.8], period of pi, amplitude of 0.8, and is reflected about the x-axis compared to it's parent function cos(x).

midline: y=0; amplitude: | A |=0.8; period: P=2π | B | =π; phase shift: C B =0 or none

中央線: y=0;、振幅: | A |=0.8;、周期: P=2π | B | =π;、位相のずれ: C B =0 または無し

Solution 9解答 9

A graph of -2cos((pi/3)x+(pi/6)). Graph has amplitude of 2, period of 6, and has a phase shift of 0.5 to the left.

midline: y=0; amplitude: | A |=2; period: P=2π | B | =6; phase shift: C B =1 2

中央線: y=0;、振幅: | A |=2;、周期: P=2π | B | =6;、位相のずれ: C B =1 2

Solution 10解答 10

7

A graph of 7cos(x). Graph has amplitude of 7, period of 2pi, and range of [-7,7].

Solution 11解答 11

y=3cos( x )4

A cosine graph with range [-1,-7]. Period is 2 pi. Local maximums at (0,-1), (2pi,-1), and (4pi, -1). Local minimums at (pi,-7) and (3pi, -7).

Solution 1解答 1

A graph of two periods of a modified tangent function, with asymptotes at x=-3 and x=3.

Solution 2解答 2

It would be reflected across the line y=1, becoming an increasing function.

直線 y=1 に関して折り返され、増加する関数になる。

Solution 3解答 3

g(x)=4tan(2x)

Solution 4解答 4

This is a vertical reflection of the preceding graph because A is negative.

A が負なので、これは前のグラフを縦に折り返したものである。

A graph of one period of a modified secant function, which looks like an downward facing prarbola and a upward facing parabola.

Solution 5解答 5

A graph of one period of a modified secant function. There are two vertical asymptotes, one at approximately x=-pi/20 and one approximately at 3pi/16.

Solution 6解答 6

A graph of one period of a modified secant function, which looks like an downward facing prarbola and a upward facing parabola.

Solution 7解答 7

A graph of two periods of both a secant and consine function. Grpah shows that cosine function has local maximums where secant function has local minimums and vice versa.

Solution 1解答 1

arccos(0.8776)0.5

Solution 2解答 2

π 2 ;π 4 ;π;π 3

Solution 3解答 3

1.9823 or 113.578°

1.9823 すなわち 113.578°

Solution 4解答 4

sin −1 (0.6)=36.87°=0.6435 radians

sin −1 (0.6)=36.87°=0.6435 ラジアン

Solution 5解答 5

π 8 ;2π 9

Solution 6解答 6

3π 4

Solution 7解答 7

12 13

Solution 8解答 8

42 9

Solution 9解答 9

4x 16x 2 +1

8.1 Section Exercises8.1 節末問題

Solution 1解答 1

The sine and cosine functions have the property that f( x+P )=f( x ) for a certain P. This means that the function values repeat for every P units on the x-axis.

正弦関数と余弦関数は、ある P について f( x+P )=f( x ) という性質を持つ。つまり、x軸上で P 単位ごとに関数の値が繰り返す。

Solution 3解答 3

The absolute value of the constant A (amplitude) increases the total range and the constant D (vertical shift) shifts the graph vertically.

定数 A の絶対値(振幅)が値域の幅を広げ、定数 D(縦の移動)がグラフを縦に移す。

Solution 5解答 5

At the point where the terminal side of t intersects the unit circle, you can determine that the sint equals the y-coordinate of the point.

t の動径が単位円と交わる点で、sint がその点の y座標に等しいと決められる。

Solution 7解答 7

A graph of (2/3)cos(x). Graph has amplitude of 2/3, period of 2pi, and range of [-2/3, 2/3].

amplitude: 2 3 ; period: 2π; midline: y=0; maximum: y=2 3 occurs at x=2π; minimum: y=2 3 occurs at x=π; for one period, the graph starts at 0 and ends at 2π

振幅: 2 3 ;、周期: 2π;、中央線: y=0;、最大値: y=2 3(x=2π; で生じる)、最小値: y=2 3(x=π; で生じる)。1周期分のグラフは0から始まり 2π で終わる。

Solution 9解答 9

A graph of 4sin(x). Graph has amplitude of 4, period of 2pi, and range of [-4, 4].

amplitude: 4; period: 2π; midline: y=0; maximum y=4 occurs at x=π 2 ; minimum: y=4 occurs at x=3π 2 ; one full period occurs from x=0 to x=2π

振幅: 4、周期: 2π;、中央線: y=0;、最大値: y=4(x=π 2 ; で生じる)、最小値: y=4(x=3π 2 ; で生じる)。1周期は x=0 から x=2π まで。

Solution 11解答 11

A graph of cos(2x). Graph has amplitude of 1, period of pi, and range of [-1,1].

amplitude: 1; period: π; midline: y=0; maximum: y=1 occurs at x=π; minimum: y=1 occurs at x=π 2 ; one full period is graphed from x=0 to x=π

振幅: 1、周期: π;、中央線: y=0;、最大値: y=1(x=π; で生じる)、最小値: y=1(x=π 2 ; で生じる)。1周期分は x=0 から x=π まで描かれる。

Solution 13解答 13

A graph of 4cos(pi*x). Grpah has amplitude of 4, period of 2, and range of [-4, 4].

amplitude: 4; period: 2; midline: y=0; maximum: y=4 occurs at x=2; minimum: y=4 occurs at x=1

振幅: 4、周期: 2、中央線: y=0;、最大値: y=4(x=2; で生じる)、最小値: y=4(x=1 で生じる)。

Solution 15解答 15

A graph of 3sin(8(x+4))+5. Graph has amplitude of 3, range of [2, 8], and period of pi/4.

amplitude: 3; period: π 4 ; midline: y=5; maximum: y=8 occurs at x=0.12; minimum: y=2 occurs at x=0.516; horizontal shift: 4; vertical translation 5; one period occurs from x=0 to x=π 4

振幅: 3、周期: π 4 ;、中央線: y=5;、最大値: y=8(x=0.12; で生じる)、最小値: y=2(x=0.516; で生じる)、横の移動: 4;、縦の平行移動: 5。1周期は x=0 から x=π 4 まで。

Solution 17解答 17

A graph of 5sin(5x+20)-2. Graph has an amplitude of 5, period of 2pi/5, and range of [-7,3].

amplitude: 5; period: 2π 5 ; midline: y=−2; maximum: y=3 occurs at x=0.08; minimum: y=−7 occurs at x=0.71; phase shift: −4; vertical translation: −2; one full period can be graphed on x=0 to x=2π 5

振幅: 5、周期: 2π 5 ;、中央線: y=−2;、最大値: y=3(x=0.08; で生じる)、最小値: y=−7(x=0.71; で生じる)、位相のずれ: −4;、縦の平行移動: −2;。1周期分は x=0 から x=2π 5 まで描ける。

Solution 19解答 19

A graph of -cos(t+pi/3)+1. Graph has amplitude of 1, period of 2pi, and range of [0,2]. Phase shifted pi/3 to the left.

amplitude: 1 ; period: 2π; midline: y=1; maximum: y=2 occurs at x=2.09; minimum: y=0 occurs at t=5.24; phase shift: π 3 ; vertical translation: 1; one full period is from t=0 to t=2π

振幅: 1、周期: 2π;、中央線: y=1;、最大値: y=2(x=2.09; で生じる)、最小値: y=0(t=5.24; で生じる)、位相のずれ: π 3 ;、縦の平行移動: 1。1周期分は t=0 から t=2π まで。

Solution 21解答 21

A graph of -sin((1/2)*t + 5pi/3). Graph has amplitude of 1, range of [-1,1], period of 4pi, and a phase shift of -10pi/3.

amplitude: 1; period: 4π; midline: y=0; maximum: y=1 occurs at t=11.52; minimum: y=1 occurs at t=5.24; phase shift: 10π 3 ; vertical shift: 0

振幅: 1、周期: 4π;、中央線: y=0;、最大値: y=1(t=11.52; で生じる)、最小値: y=1(t=5.24; で生じる)、位相のずれ: 10π 3 ;、縦の移動: 0。

Solution 23解答 23

amplitude: 2; midline: y=3; period: 4; equation: f(x)=2sin( π 2 x )3

振幅: 2、中央線: y=3;、周期: 4、式: f(x)=2sin( π 2 x )3

Solution 25解答 25

amplitude: 2; period: 5; midline: y=3; equation: f(x)=2cos( 2π 5 x )+3

振幅: 2、周期: 5、中央線: y=3;、式: f(x)=2cos( 2π 5 x )+3

Solution 27解答 27

amplitude: 4; period: 2; midline: y=0; equation: f(x)=4cos( π( xπ 2 ) )

振幅: 4、周期: 2、中央線: y=0;、式: f(x)=4cos( π( xπ 2 ) )

Solution 29解答 29

amplitude: 2; period: 2; midline y=1; equation: f( x )=2cos( πx )+1

振幅: 2、周期: 2、中央線 y=1;、式: f( x )=2cos( πx )+1

Solution 31解答 31

0,π

Solution 33解答 33

sin(π2)=1

Solution 35解答 35

π2

Solution 37解答 37

f(x)=sinx is symmetric

f(x)=sinx は対称である。

Solution 39解答 39

π3,5π3

Solution 41解答 41

Maximum: 1 at x= 0 ; minimum: -1 at x= π

最大値: x= 0 での 1。最小値: x= π での -1

Solution 43解答 43

A linear function is added to a periodic sine function. The graph does not have an amplitude because as the linear function increases without bound the combined function h(x)=x+sinx will increase without bound as well. The graph is bounded between the graphs of y=x+1 and y=x-1 because sine oscillates between −1 and 1.

一次関数が周期を持つ正弦関数に足されている。一次関数が限りなく増えると、合わせた関数 h(x)=x+sinx も限りなく増えるので、このグラフに振幅は無い。正弦が−1と1のあいだで振れるので、このグラフは y=x+1y=x-1 のグラフのあいだに挟まれる。

This image displays a graph of the function h(t) versus t. The horizontal axis represents t, ranging from 0 to 2π, with key markers at π/2, π, and 3π/2. The vertical axis represents h(t), ranging from 0 to 6. The curve starts at the origin (0,0) and rises continuously to approximately (2π, 6). The function exhibits an initial period of increasing slope, followed by a region where the slope decreases (around t=π, where h(t) is about 3), indicating a slowing rate of increase, and then the slope increases again, showing an accelerating rate of increase towards the end of the interval.

Solution 45解答 45

There is no amplitude because the function is not bounded.

この関数は有界でないので、振幅は無い。

The image presents a graph of a periodic function plotted on a coordinate system featuring an inverted y-axis. The x-axis, labeled

Solution 47解答 47

The graph is symmetric with respect to the y-axis and there is no amplitude because the function’s bounds decrease as |x| grows. There appears to be a horizontal asymptote at y=0 .

このグラフは y軸に関して対称であり、|x| が大きくなるにつれてこの関数の上下の限りが小さくなるので、振幅は無い。y=0 に水平漸近線があるように見える。

A graph showing a damped oscillatory function resembling sin(x)/x. The x-axis spans from -5π to 5π, and the y-axis from -2 to 2. The curve peaks at (0,1) and crosses the x-axis at integer multiples of π.

8.2 Section Exercises8.2 節末問題

Solution 1解答 1

Since y=cscx is the reciprocal function of y=sinx, you can plot the reciprocal of the coordinates on the graph of y=sinx to obtain the y-coordinates of y=cscx. The x-intercepts of the graph y=sinx are the vertical asymptotes for the graph of y=cscx.

y=cscxy=sinx の逆数の関数なので、y=sinx のグラフ上の座標の逆数を打てば y=cscx の y座標が得られる。グラフ y=sinx の x切片が、y=cscx のグラフの垂直漸近線である。

Solution 3解答 3

Answers will vary. Using the unit circle, one can show that tan( x+π )=tanx.

答えはさまざまでよい。単位円を使えば tan( x+π )=tanx を示せる。

Solution 5解答 5

The period is the same: 2π.

周期は同じで 2π である。

Solution 7解答 7

IV

Solution 9解答 9

III

Solution 11解答 11

period: 8; horizontal shift: 1 unit to left

周期: 8、横の移動: 左に1単位

Solution 13解答 13

1.5

Solution 15解答 15

5

Solution 17解答 17

cotxcosxsinx

Solution 19解答 19

A graph of two periods of a modified tangent function. There are two vertical asymptotes.

stretching factor: 2; period: π 4 ; asymptotes: x=1 4 ( π 2 +πk )+8, where k is an integer

伸びの倍率: 2、周期: π 4 ;、漸近線: x=1 4 ( π 2 +πk )+8,ここでkは整数

Solution 21解答 21

A graph of two periods of a modified cosecant function. Vertical Asymptotes at x= -6, -3, 0, 3, and 6.

stretching factor: 6; period: 6; asymptotes: x=3k, where k is an integer

伸びの倍率: 6、周期: 6、漸近線: x=3k,ここでkは整数

Solution 23解答 23

A graph of two periods of a modified tangent function. Vertical asymptotes at multiples of pi.

stretching factor: 1; period: π; asymptotes: x=πk, where k is an integer

伸びの倍率: 1、周期: π;、漸近線: x=πk,ここでkは整数

Solution 25解答 25

A graph of two periods of a modified tangent function. Three vertical asymptiotes shown.

Stretching factor: 1; period: π; asymptotes: x=π 4 +πk, where k is an integer

伸びの倍率: 1、周期: π;、漸近線: x=π 4 +πk,ここでkは整数

Solution 27解答 27

A graph of two periods of a modified cosecant function. Vertical asymptotes at multiples of pi.

stretching factor: 2; period: 2π; asymptotes: x=πk, where k is an integer

伸びの倍率: 2、周期: 2π;、漸近線: x=πk,ここでkは整数

Solution 29解答 29

A graph of two periods of a modified secant function. Vertical asymptotes at x=-pi/2, -pi/6, pi/6, and pi/2.

stretching factor: 4; period: 2π 3 ; asymptotes: x=π 6 k, where k is an odd integer

伸びの倍率: 4、周期: 2π 3 ;、漸近線: x=π 6 k,ここでkは奇数

Solution 31解答 31

A graph of two periods of a modified secant function. There are four vertical asymptotes all pi/5 apart.

stretching factor: 7; period: 2π 5 ; asymptotes: x=π 10 k, where k is an odd integer

伸びの倍率: 7、周期: 2π 5 ;、漸近線: x=π 10 k,ここでkは奇数

Solution 33解答 33

A graph of two periods of a modified cosecant function. Three vertical asymptotes, each pi apart.

stretching factor: 2; period: 2π; asymptotes: x=π 4 +πk, where k is an integer

伸びの倍率: 2、周期: 2π;、漸近線: x=π 4 +πk,ここでkは整数

Solution 35解答 35

A graph of a modified cosecant function. Four vertical asymptotes.

stretching factor: 7 5 ; period: 2π; asymptotes: x=π 4 +πk, where k is an integer

伸びの倍率: 7 5 ;、周期: 2π;、漸近線: x=π 4 +πk,ここでkは整数

Solution 37解答 37

y=tan( 3( xπ 4 ) )+2

A graph of two periods of a modified tangent function. Vertical asymptotes at x=-pi/4 and pi/12.

Solution 39解答 39

f( x )=csc( 2x )

Solution 41解答 41

f( x )=csc( 4x )

Solution 43解答 43

f( x )=2cscx

Solution 45解答 45

f(x)=1 2 tan(100πx)

Solution 47解答 47

A graph of the absolute value of the cotangent function. Range is 0 to infinity.

Solution 49解答 49

A graph of tangent of x.

Solution 51解答 51

A graph of two periods of a modified secant function. Vertical asymptotes at multiples of 500pi.

Solution 53解答 53

A graph showing a horizontal blue line at y=1 on a Cartesian coordinate system. The x-axis is labeled with multiples of pi/2, and the y-axis is labeled with integers from -2 to 2.

Solution 55解答 55

( π 2 ,π 2 );x=π 2 and x=π 2 ; the distance grows without bound as | x | approaches π 2 —i.e., at right angles to the line representing due north, the boat would be so far away, the fisherman could not see it;3; when x=π 3 , the boat is 3 km away;1.73; when x=π 6 , the boat is about 1.73 km away;1.5 km; when x=0

x=π 2x=π 2 ;| x |π 2 に近づくにつれて距離は限りなく大きくなる。すなわち、真北を表す線と直角の向きでは、船はあまりに遠く、釣り人には見えないだろう。3。x=π 3 のとき、船は3km離れている。1.73。x=π 6 のとき、船はおよそ1.73km離れている。1.5km。x=0 のとき。

Solution 57解答 57

h( x )=2tan( π 120 x );h( 0 )=0: after 0 seconds, the rocket is 0 mi above the ground; h( 30 )=2: after 30 seconds, the rockets is 2 mi high;As x approaches 60 seconds, the values of h( x ) grow increasingly large. The distance to the rocket is growing so large that the camera can no longer track it.

h( 0 )=0:。0秒後、ロケットは地上0マイルにある。h( 30 )=2:。30秒後、ロケットは2マイルの高さにある。x が60秒に近づくにつれて、h( x ) の値はどんどん大きくなる。ロケットまでの距離があまりに大きくなり、カメラはもう追えなくなる。

8.3 Section Exercises8.3 節末問題

Solution 1解答 1

The function y=sinx is one-to-one on [ π 2 ,π 2 ]; thus, this interval is the range of the inverse function of y=sinx, f(x)=sin 1 x. The function y=cosx is one-to-one on [ 0,π ]; thus, this interval is the range of the inverse function of y=cosx,f(x)=cos 1 x.

関数 y=sinx[ π 2 ,π 2 ]; で一対一である。よってこの区間が y=sinx f(x)=sin 1 x の逆関数の値域になる。関数 y=cosx[ 0,π ]; で一対一である。よってこの区間が y=cosx,f(x)=cos 1 x の逆関数の値域になる。

Solution 3解答 3

π 6 is the radian measure of an angle between π 2 and π 2 whose sine is 0.5.

π 6 は、正弦が0.5である π 2π 2 のあいだの角の、ラジアンでの大きさである。

Solution 5解答 5

In order for any function to have an inverse, the function must be one-to-one and must pass the horizontal line test. The regular sine function is not one-to-one unless its domain is restricted in some way. Mathematicians have agreed to restrict the sine function to the interval [ π 2 ,π 2 ] so that it is one-to-one and possesses an inverse.

どんな関数も逆関数を持つには、一対一であり、横の直線の判定に通らなければならない。ふつうの正弦関数は、定義域を何らかのしかたで制限しない限り一対一でない。数学者は、正弦関数が一対一になって逆関数を持つよう、定義域を区間 [ π 2 ,π 2 ] に制限することで合意している。

Solution 7解答 7

True . The angle, θ 1 that equals arccos(x), x>0, will be a second quadrant angle with reference angle, θ 2, where θ 2 equals arccosx, x>0. Since θ 2 is the reference angle for θ 1, θ 2 =πθ 1 and arccos(x) = πarccosx-

正しい。arccos(x)x>0 に等しい角 θ 1 は、基準角 θ 2 を持つ第2象限の角になる。ここで θ 2arccosxx>0 に等しい。θ 2θ 1 の基準角なので、θ 2 =πθ 1 であり arccos(x) = πarccosx である。

Solution 9解答 9

π 6

Solution 11解答 11

3π 4

Solution 13解答 13

π 3

Solution 15解答 15

π 3

Solution 17解答 17

1.98

Solution 19解答 19

0.93

Solution 21解答 21

1.41

Solution 23解答 23

0.56 radians

0.56ラジアン

Solution 25解答 25

0

Solution 27解答 27

0.71

Solution 29解答 29

-0.71

Solution 31解答 31

π 4

Solution 33解答 33

0.8

Solution 35解答 35

5 13

Solution 37解答 37

x1 x 2 +2x

Solution 39解答 39

x 2 1 x

Solution 41解答 41

x+0.5 x 2 x+3 4

Solution 43解答 43

2x+1x+1

Solution 45解答 45

2x+1 x

Solution 47解答 47

t

Solution 49解答 49

A graph of the function arc cosine of x over -1 to 1. The range of the function is 0 to pi.

domain [ 1,1 ]; range [ 0,π ]

定義域 [ 1,1 ];、値域 [ 0,π ]

Solution 51解答 51

approximately x=0.00

およそ x=0.00

Solution 53解答 53

0.395 radians

0.395ラジアン

Solution 55解答 55

1.11 radians

1.11ラジアン

Solution 57解答 57

1.25 radians

1.25ラジアン

Solution 59解答 59

0.405 radians

0.405ラジアン

Solution 61解答 61

No. The angle the ladder makes with the horizontal is 60 degrees.

いいえ。梯子が水平線となす角は60度である。

Review Exercises復習問題

Solution 1解答 1

amplitude: 3; period: 2π; midline: y=3; no asymptotes

振幅: 3、周期: 2π;、中央線: y=3;、漸近線は無い。

A graph of two periods of a function with a cosine parent function. The graph has a range of [0,6] graphed over -2pi to 2pi. Maximums as -pi and pi.

Solution 3解答 3

amplitude: 3; period: 2π; midline: y=0; no asymptotes

振幅: 3、周期: 2π;、中央線: y=0;、漸近線は無い。

A graph of four periods of a function with a cosine parent function. Graphed from -4pi to 4pi. Range is [-3,3].

Solution 5解答 5

amplitude: 3; period: 2π; midline: y=4; no asymptotes

振幅: 3、周期: 2π;、中央線: y=4;、漸近線は無い。

A graph of two periods of a sinusoidal function. Range is [-7,-1]. Maximums at -5pi/4 and 3pi/4.

Solution 7解答 7

amplitude: 6; period: 2π 3 ; midline: y=1; no asymptotes

振幅: 6、周期: 2π 3 ;、中央線: y=1;、漸近線は無い。

A sinusoidal graph over two periods. Range is [-7,5], amplitude is 6, and period is 2pi/3.

Solution 9解答 9

stretching factor: none; period: π; midline: y=4; asymptotes: x=π 2 +πk, where k is an integer

伸びの倍率: 無し、周期: π;、中央線: y=4;、漸近線: k を整数として x=π 2 +πk

A graph of a tangent function over two periods. Graphed from -pi to pi, with asymptotes at -pi/2 and pi/2.

Solution 11解答 11

stretching factor: 3; period: π 4 ; midline: y=2; asymptotes: x=π 8 +π 4 k, where k is an integer

伸びの倍率: 3、周期: π 4 ;、中央線: y=2;、漸近線: k を整数として x=π 8 +π 4 k

A graph of a tangent function over two periods. Asymptotes at -pi/8 and pi/8. Period of pi/4. Midline at y=-2.

Solution 13解答 13

amplitude: none; period: 2π; no phase shift; asymptotes: x=π 2 k, where k is an odd integer

振幅: 無し、周期: 2π;、位相のずれは無い、漸近線: k を奇数として x=π 2 k

A graph of two periods of a secant function. Period of 2 pi, graphed from -2pi to 2pi. Asymptotes at -3pi/2, -pi/2, pi/2, and 3pi/2.

Solution 15解答 15

amplitude: none; period: 2π 5 ; no phase shift; asymptotes: x=π 5 k, where k is an integer

振幅: 無し、周期: 2π 5 ;、位相のずれは無い、漸近線: k を整数として x=π 5 k

A graph of a cosecant functionover two and a half periods. Graphed from -pi to pi, period of 2pi/5.

Solution 17解答 17

amplitude: none; period: 4π; no phase shift; asymptotes: x=2πk, where k is an integer

振幅: 無し、周期: 4π;、位相のずれは無い、漸近線: k を整数として x=2πk

A graph of two periods of a cosecant function. Graphed from -4pi to 4pi. Asymptotes at multiples of 2pi. Period of 4pi.

Solution 19解答 19

largest: 20,000; smallest: 4,000

最大: 20,000、最小: 4,000

Solution 21解答 21

amplitude: 8,000; period: 10; phase shift: 0

振幅: 8,000、周期: 10、位相のずれ: 0

Solution 23解答 23

In 2007, the predicted population is 4,413. In 2010, the population will be 11,924.

2007年の人口の予測は4,413である。2010年の人口は11,924になる。

Solution 25解答 25

5 in.

5インチ

Solution 27解答 27

10 seconds

10秒

Solution 29解答 29

π 6

Solution 31解答 31

π 4

Solution 33解答 33

π 3

Solution 35解答 35

No solution

解なし

Solution 37解答 37

12 5

Solution 39解答 39

The graphs are not symmetrical with respect to the line y=x. They are symmetrical with respect to the y-axis.

このグラフは直線 y=x に関して対称でない。y 軸に関して対称である。

A graph of cosine of x and secant of x. Cosine of x has maximums where secant has minimums and vice versa. Asymptotes at x=-3pi/2, -pi/2, pi/2, and 3pi/2.

Solution 41解答 41

The graphs appear to be identical.

このグラフは同じに見える。

Two graphs of two identical functions on the interval [-1 to 1]. Both graphs appear sinusoidal.

Practice Test実力テスト

Solution 1解答 1

amplitude: 0.5; period: 2π; midline y=0

振幅: 0.5、周期: 2π;、中央線 y=0

A graph of two periods of a sinusoidal function, graphed over -2pi to 2pi. The range is [-0.5,0.5]. X-intercepts at multiples of pi.

Solution 3解答 3

amplitude: 5; period: 2π; midline: y=0

振幅: 5、周期: 2π;、中央線: y=0

Two periods of a sine function, graphed over -2pi to 2pi. The range is [-5,5], amplitude of 5, period of 2pi.

Solution 5解答 5

amplitude: 1; period: 2π; midline: y=1

振幅: 1、周期: 2π;、中央線: y=1

A graph of two periods of a cosine function, graphed over -7pi/3 to 5pi/3. Range is [0,2], Period is 2pi, amplitude is1.

Solution 7解答 7

amplitude: 3; period: 6π; midline: y=0

振幅: 3、周期: 6π;、中央線: y=0

A graph of two periods of a cosine function, over -7pi/2 to 17pi/2. The range is [-3,3], period is 6pi, and amplitude is 3.

Solution 9解答 9

amplitude: none; period: π; midline: y=0, asymptotes: x=2π 3 +πk, where k is an integer

振幅: 無し、周期: π;、中央線: y=0、漸近線: k を整数として x=2π 3 +πk

A graph of two periods of a tangent function over -5pi/6 to 7pi/6. Period is pi, midline at y=0.

Solution 11解答 11

amplitude: none; period: 2π 3 ; midline: y=0, asymptotes: x=π 3 k, where k is an integer

振幅: 無し、周期: 2π 3 ;、中央線: y=0、漸近線: k を整数として x=π 3 k

A graph of two periods of a cosecant functinon, over -2pi/3 to 2pi/3. Vertical asymptotes at multiples of pi/3. Period of 2pi/3.

Solution 13解答 13

amplitude: none; period: 2π; midline: y=3

振幅: 無し、周期: 2π;、中央線: y=3

A graph of two periods of a cosecant function, graphed from -9pi/4 to 7pi/4. Period is 2pi, midline at y=-3.

Solution 15解答 15

amplitude: 2; period: 2; midline: y=0; f( x )=2sin( π( x1 ) )

振幅: 2、周期: 2、中央線: y=0;f( x )=2sin( π( x1 ) )

Solution 17解答 17

amplitude: 1; period: 12; phase shift: −6; midline y=−3

振幅: 1、周期: 12、位相のずれ: −6;、中央線 y=−3

Solution 19解答 19

D( t )=6812sin( π 12 x )

Solution 21解答 21

period: π 6 ; horizontal shift: −7

周期: π 6 ;、横の移動: −7

Solution 23解答 23

f( x )=sec( πx ); period: 2; phase shift: 0

f( x )=sec( πx );、周期: 2、位相のずれ: 0

Solution 25解答 25

4

Solution 27解答 27

The views are different because the period of the wave is 1 25 . Over a bigger domain, there will be more cycles of the graph.

この波の周期が 1 25 なので、見え方が違う。定義域が広いほど、グラフの周期の数が増える。

Two side-by-side graphs of a sinusodial function. The first graph is graphed over 0 to 1, the second graph is graphed over 0 to 3. There are many periods for each.

Solution 29解答 29

3 5

Solution 31解答 31

On the approximate intervals ( 0.5,1 ),( 1.6,2.1 ),( 2.6,3.1 ),( 3.7,4.2 ),( 4.7,5.2 ),(5.6,6.28)

およそ区間 ( 0.5,1 ),( 1.6,2.1 ),( 2.6,3.1 ),( 3.7,4.2 ),( 4.7,5.2 ),(5.6,6.28) で。

Solution 33解答 33

f( x )=2cos( 12( x+π 4 ) )+3

A graph of one period of a cosine function, graphed over -pi/4 to 0. Range is [1,5], period is pi/6.

Solution 35解答 35

This graph is periodic with a period of 2π.

このグラフは周期 2π の周期を持つ。

A graph of two periods of a sinusoidal function, The graph has a period of 2pi.

Solution 37解答 37

π 3

Solution 39解答 39

π 2

Solution 41解答 41

1( 12x ) 2

Solution 43解答 43

1 1+x 4

Solution 45解答 45

x+1 x

Solution 47解答 47

False

正しくない

Solution 49解答 49

approximately 0.07 radians

およそ0.07ラジアン