Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

The value of $\frac{sec θ \,  cosec θ}{2+tan^2θ+cot^2θ}$ is equal to :

Options:

sec θ cosec θ

sec θ sin θ

sin θ cos θ

cos θ cosec θ

Correct Answer:

sin θ cos θ

Explanation:

\(\frac{sec θ.cosec θ}{2 + tan²θ+cot² θ }\)

= \(\frac{sec θ.cosec θ}{1 + tan²θ +1 +cot² θ }\)

{ sec²θ - tan²θ = 1   & cosec²θ - cot²θ = 1 }

= \(\frac{sec θ.cosec θ}{ sec²θ . cosec² θ }\)

= \(\frac{1}{ secθ . cosec θ }\)

= cosθ . sin θ