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.
