# How do you evaluate #cos W = 0.6157#?

##### 1 Answer

Jul 19, 2016

<W = 52° or 308°.

#### Explanation:

You are trying to find an angle which has a cos value of 0.6157.

This process is known as arc-cos and is shown on most calculators as

With angles from 0° to 360° there will be two angles which have a cos value of 0.6157.

The acute angle is

The other angle is