Question

In APQR, sin R = 3/5. What is cos P?

Answer 1

cos P= 3/5

Explanation:

find the hypotenuse of the triangle using the Pythagorean theorem
`a^2+b^2=c^2\\12^2+16^2=c^2\\400=c^2\\c=20`

to find the cosine of a right triangle you do the adjacent leg over the hypotenuse which in this case is 12/20 simplified is 3/5

always remember SOH CAH TOA!