# Math Help - Find the indicated trig function HELP ^_^

1. ## Find the indicated trig function HELP ^_^

Find the indicated trig function of
θ, if θ is an angle in standard position with the terminal side defined by the given

point.
(12, 16); Find cos
θ.

answer is 4 over 5 but how do i find this?

2. ## Re: Find the indicated trig function HELP ^_^

Solution :

Given ?
Solution: Given ? is an angle in standard position with the terminal side defined by the given point. (12, 16) find cos ?
one side AB =12 and another side BC =16
by Pythagoras we fine AC²=AB²+BC²
AC²=400
AC=20
know that cos ? =16/20 cos ? =4/5