I forgot how to do this. 6 cos(4x). 6 sin(8x) i know the amplitude is 6. I'm having trouble finding the period. Can someone tell me how to find what the period is?
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The period of $\displaystyle \sin(ax)$ is $\displaystyle \dfrac{2\pi}{a}$. Same applies for $\displaystyle \cos(ax)$
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