Question

Cos^-1(cos 43°)
PLEASE HELP ME

Answer 1

`\: \: \: \: \:`

`= \cos(1) \cos(43°) \\ \\ in \: \: alternate \: \: form \: \\ \\ = 0.395152`

Explanation:

`\cos( - 1) ( \cos(43°))`

• simplify the expression usiNg the symmetry of trigonometry

`= \cos(1) \cos(43°) \\ \\ \\ or \: \: in \: \: alternate \: \: form \\ \\ = 0.395152`

hope it helps

Answer 2

`\cos^(-1)(\cos 43^(\circ))=43^(\circ)\\\\\\\text{In radians,}~~ (43\pi)/(180)`