SOLUTION: A sound wave is modeled with the equation y=1/2 cos 2pi/3 theta. a. Find the period. Explain your method b. Find the amplitude. Explain your method

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Question 870927: A sound wave is modeled with the equation y=1/2 cos 2pi/3 theta.
a. Find the period. Explain your method
b. Find the amplitude. Explain your method
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The period equals 2%2Api divided by the multiplier of theta.
P=%282%2Api%29%2F%28%282%2Api%29%2F3%29=3
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The amplitude of the cosine function is 1. The 1/2 multiplier makes the amplitude of the entire function equal to 1/2.