Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If sin θ + cos θ = \(\sqrt {7 }\)cos θ, then value of cot θ is?

Options:

\(\frac{6}{√7 + 1}\)

\(\frac{√7 + 1}{6}\)

1

0

Correct Answer:

\(\frac{√7 + 1}{6}\)

Explanation:

sin θ + cos θ = \(\sqrt {7 }\)cos θ

divide by cos θ

⇒ tan θ + 1 = \(\sqrt {7 }\)

⇒ tan θ = \(\sqrt {7 }\) - 1

⇒ cot θ = \(\frac{1}{\sqrt {7 } - 1}\)

            = \(\frac{1}{\sqrt {7 } - 1}\) × \(\frac{\sqrt {7 } + 1}{\sqrt {7 } + 1}\)

            = \(\frac{√7 + 1}{6}\)