Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If cosec θ - cot θ = \(\frac{1}{\sqrt {7 }}\), then value of cosec θ is?

Options:

 \(\frac{4}{\sqrt {3 }}\)

 \(\frac{4}{\sqrt {7 }}\)

1

0

Correct Answer:

 \(\frac{4}{\sqrt {7 }}\)

Explanation:

cosec θ - cot θ = \(\frac{1}{\sqrt {7 }}\)  ............(i)

then cosec θ + cot θ = \(\sqrt {7}\)

adding the equation

2 cosec θ = \(\sqrt {7 }\) + \(\frac{1}{\sqrt {7 }}\)

⇒ 2cosec θ = \(\frac{8}{\sqrt {7 }}\) or cosec θ = \(\frac{4}{\sqrt {7 }}\)