Question

How do you solve `2cos3t=1`?

Answer 1

Solve 2cos 3t = 1
`t = +- 20` deg

Explanation:

2cos 3t = 1 --> cos 3t = 1/2 --> `3t = +- pi/3` or `+-60` deg ->

`t = +- pi/9` or `+- 20` deg