Question

Find the exact value of cos -1050.OA.-3OB.-12/2OC. 1OD. 1/3Reset Selection

Answer 1

Given;

`\cos(-1050)`

Rewrite the expression using;

`\cos(-x)=\cos x`

Thus;

`\begin{gathered} \cos(-1050)=\cos(1050) \\ \\ \cos(1050)=\cos(330) \end{gathered}`

Then;

`\cos(330)=(√(3))/(2)`

CORRECT OPTION: D