If #theta# is an angle in standard position on a rectangular coordinate system and the point P(sqrt 7,-3) lies on its terminal side, find do you find the exact value of #cos(theta)#?
1 Answer
Jun 16, 2015
Explanation:
(See diagram)
The value of the hypotenuse can be calculated (as shown) using the Pythagorean Theorem as
The cosine is (by definition) the adjacent side divided by the hypotenuse.