Question

In a right triangle, θ is an acute angle and cos θ = 4/9. What is the value of tan θ

Answer 1

cos Θ = 4/9. take both sides by the inverse operation of cos.

cos^-1(Θ) = cos^-1(4/9)

Θ = 63.61°

tan(63.61°) = 2.02°