Answer:
Sin = 6/7
cos = sqrt(13)/7
sec = 7sqrt(13) / 13
Step-by-step explanation:
First find the unknown side length using the pythagorean theorem (it equals 3sqrt(13))
Sin is opposite over hypotenuse, so it would be 18/21 or 6/7
Cos is adjacent over hypotenuse, so it would be 3sqrt(13) / 21 or sqrt(13)/7
Sec is the reciprocal of the cos, so it would be 7/sqrt(13). However, the answer is 7sqrt(13)/13 because we rationalized our bases.
