Question

How do you solve `(2cos(pi(x)))/3 + 1/2 = 0`?

Answer 1

Solve trig equation.
Answer: `+- 44.14` deg

Explanation:

`(2cos (pix))/3 = - 1/2` --> `cos (pix) = - 3/4 = - 0.75`

Calculator gives --> `pix = +- 138.60` deg -->

`x = 138.60/3.14 = +- 44.14` deg