Given that sin α = - 513 and α is the third quadrant angle, the values of cos α and Tan α are obtained

Given that sin α = - 513 and α is the third quadrant angle, the values of cos α and Tan α are obtained

Because α is the third quadrant angle, cos α < 0, Tan α > 0, and because sin α = - 513, cos α = - 1 − sin2 α = - 1 − (- 513) 2 = - 1213, Tan α = sin α, cos α = - 513 − 1213 = 512

It is known that there is a point P (x, 5) on the terminal edge of angle α, and cos α = x △ 13,90 °

The solution changes from 90 degree to 90 degree

Given that sin α = - 5 / 13 and α is the third quadrant angle, find cos α and Tan α

cosa=-12/13 tana=5/12