Question

Please help urgent ! trig !

Answer 1

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.