What is the period of y=cos(1/3theta)?

1 Answer
Jan 4, 2017

For the general form, $y = \left(A\right) \cos \left(B \theta + C\right) + D$, the period is, $T = \frac{2 \pi}{B}$
For the given equation, $y = \cos \left(\frac{1}{3} \theta\right)$, the period is $T = \frac{2 \pi}{\frac{1}{3}} = 6 \pi$