Question

Find the cosine of 300°. Round your answer to the nearest hundredth, if necessary.

-0.87
-0.5
0.5
0.87

Answer 1

option C . 0.5

Explanation:

`cos 300 = cos(2\pi - 300 ) = cos( 360 - 300) = cos 60 = 0.5`

Using the formula :

`cos\theta = cos (2\pi - \theta )`