Question

Question #01910

Answer 1

Solve `5 + 3cos (x/2) = 7`

`x = +- 96.38` deg

Explanation:

`5 + 3cos (x/2) = 7`
`3cos (x/2) = 2`
`cos (x/2) = 2/3`
Calculator gives -->
`cos (x/2) = 2/3` --> `x/2 = +- 48^@19` --> `x = +- 96^@38`