2009 · Q24
If cot θ = 8/15, then what is the value of √[(1 − cos θ)/(1 + cos θ)], where θ is a positive acute angle?
Elementary MathematicsTrigonometry
- A1/5
- B2/5
- C3/5
- D4/5
Explanation
√[(1−cosθ)/(1+cosθ)] = tan(θ/2) = 3/5.
If cot θ = 8/15, then what is the value of √[(1 − cos θ)/(1 + cos θ)], where θ is a positive acute angle?
Explanation
√[(1−cosθ)/(1+cosθ)] = tan(θ/2) = 3/5.