# The point (15, 20) is on the terminal side of an angle drawn in standard position. How do you find the exact value of the cosine of the angle?

##### 1 Answer

Oct 19, 2015

Find cos of an angle x.

Ans:

#### Explanation:

Call x the angle to be determined:

The hypotenuse h of the right triangle with 2 sides x and y is:

h^2 = x^2 + y^2 = 9 + 16 = 25 --> h = 5.