Question

Question #67831

Answer 1

`+- 17^@50 + k180^@`

Explanation:

cos 2x = sin 55
Calculator gives: sin 55 = 0.82
cos 2x = 0.82
Calculator and unit circle gives -->
`2x = +- 35^@ + k360^@`
`x = +- 17^@50 + k180^@`