# Math Help - Trig transformation graph - Easy

1. ## Trig transformation graph - Easy

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?

2. The period of $\sin(ax)$ is $\dfrac{2\pi}{a}$. Same applies for $\cos(ax)$