Question

Evaluate: cos ω, if tan ω = - 4/3 and sin ω > 0

Answer 1

-3/5

Explanation:

tan = opp/adj using pathagorean the hypt is 5

cos = 3/5

tan is negative in quad 2 and 4

sin is positive in quad 1 and 2

so because tan is negative and sine is positive the cosine is negative

-3/5