# What is the value of $\rm \sqrt{1 - \cos^2 θ}$

21 views

closed
What is the value of $\rm \sqrt{1 - \cos^2 θ}$
1. sec θ
2. sin θ
3. cos θ
4. tan θ

by (30.0k points)
selected

Correct Answer - Option 2 : sin θ

Concept:

sin2θ + cos2θ = 1

Calculation:

sin2θ + cos2θ = 1

⇒ sin2θ = 1 – cos2θ

⇒ sin θ  = $\rm \sqrt{1 - \cos^2 θ}$