Question

How do you solve [0,360) 4sec^2x - 4 = 0 ??

Answer 1

0, 180, 360

Explanation:

`4sec^2 x - 4 = 0`
`sec^2 x = 1`
`cos x = 1/sec x = +- 1`
Unit circle give 3 solutions:
x = 0
x = 180
x = 360