Question

Find cos θ if sin θ = -5/13 and tan θ > 0.

answers:
-5/12

-13/5

-12/13

12/5

Answer 1

using the unit circle, x can be -12 or 12, cos θ is either in 3rd or 4th quadrant. But because tan θ > 0, which is the 3rd quadrant, the answer -12/13

Answer 2

Okay I see, thank you so much!