Practice Trigonometric Function Graphs in Math

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

The graphs of sinโกx\sin x, cosโกx\cos x, and tanโกx\tan x as functions of a real variable, characterized by amplitude, period, phase shift, and vertical shift.

If you track the yy-coordinate of a point moving around the unit circle and plot it against the angle, you get the sine wave. It's the shape of ocean waves, sound waves, and alternating current. The general form y=asinโก(bxโˆ’c)+dy = a\sin(bx - c) + d lets you control four properties: how tall the wave is (aa, amplitude), how fast it repeats (bb, affecting period), where it starts (cc, phase shift), and its vertical center (dd, vertical shift).

Showing a random 20 of 50 problems.

Example 1

medium
Find the period of y=sinโกโ€‰โฃ(x2)y = \sin\!\left(\frac{x}{2}\right).

Example 2

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Find the amplitude and period of y=4cosโก(2x)y = 4\cos(2x).

Example 3

easy
State the range of y=5cosโกxy = 5\cos x.

Example 4

easy
At what value of xx in [0,2ฯ€)[0, 2\pi) does y=sinโกxy = \sin x reach its maximum?

Example 5

easy
What is the maximum value of y=cosโกxy = \cos x?

Example 6

medium
Find the period of y=sinโก(3x)y = \sin(3x).

Example 7

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How many complete cycles does y=sinโก(ฯ€x)y = \sin(\pi x) make on [0,6][0, 6]?

Example 8

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Find the phase shift of y=cosโก(3x+ฯ€)y = \cos(3x + \pi).

Example 9

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State the vertical shift and the resulting range of y=2sinโกx+5y = 2\sin x + 5.

Example 10

easy
What is the amplitude of y=3sinโกxy = 3\sin x?

Example 11

easy
What is the amplitude of y=โˆ’2cosโกxy = -2\cos x?

Example 12

challenge
Find all values of b>0b > 0 so that y=sinโก(bx)y = \sin(bx) has exactly 55 complete periods on [0,2ฯ€][0, 2\pi].

Example 13

medium
Compare the periods of y=sinโก(2x)y = \sin(2x) and y=sinโก(x/2)y = \sin(x/2): which is shorter?

Example 14

easy
What is the midline of y=sinโกxโˆ’4y = \sin x - 4?

Example 15

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A Ferris wheel of radius 1010 m has its center 1212 m above the ground and rotates once every 4040 s. Write the height h(t)h(t) if a rider starts at the lowest point at t=0t=0.

Example 16

easy
Where are the vertical asymptotes of y=tanโกxy = \tan x closest to the origin?

Example 17

challenge
The function y=asinโก(bx)+dy = a\sin(bx) + d oscillates between a high of 11 and a low of 3, completing one cycle every 8 units. Find aa, bb, and dd.

Example 18

medium
Write a cosine function with amplitude 6, period ฯ€\pi, and midline y=โˆ’1y = -1.

Example 19

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How many complete cycles does y=cosโก(4x)y = \cos(4x) make on [0,2ฯ€][0, 2\pi]?

Example 20

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Find the midline and range of y=3cosโกxโˆ’2y = 3\cos x - 2.