For the angle shown is a point given on its terminal arm. [picture shows -12, -5 in quadrant three of the unit circle].

Question

Calculate the values of the three primary trigonmetric ratios, accurate to four decimal places.

Dont understand thissss

Answer 1

sin = x/r = -12/13
cos = y/r = -5/13
tan = y/x = 5/12
...

Answer 2

rats. I mixed up sin and cos.