Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If \(\frac{sec θ + tan θ}{sec θ - tan θ}\) = 2\(\frac{51}{79}\); then value of sin θ is?

Options:

\(\frac{91}{144}\)

\(\frac{65}{144}\)

\(\frac{39}{72}\)

\(\frac{35}{72}\)

Correct Answer:

\(\frac{65}{144}\)

Explanation:

\(\frac{sec θ + tan θ}{sec θ - tan θ}\) = 2\(\frac{51}{79}\)

⇒ \(\frac{ 1+ sin θ}{ 1 - sin θ}\) = \(\frac{209}{79}\)

⇒ 79 ( 1 + sin θ ) = 209 ( 1 - sin θ )

⇒ 79 + 79 sin θ = 209 - 209 sin θ

⇒ 209 sin θ + 79 sin θ = 209 - 79

⇒ 288 sin θ = 130

⇒ sin θ = \(\frac{130}{288}\) = \(\frac{65}{144}\)