Question

Consider the function
y(x) = 5 cos(x/3+π/4)

.
a) Find the period.
1. None of these
2.6/π
3. 3π
4. 5
5.3/π
6. 6

Answer 1

period is
\[\frac{2\pi}{b}=\frac{2\pi}{\frac{1}{3}}=6\pi\]

Answer 2

so looks like none of the above. is this some on line class?

Answer 3

yes, the answer is definitely \[6\pi\]so there is an error either on the test or your post.