SSC CGL 2024 PYQ — Question 60

SSC CGL - 12 Sep 2024 - Shift 1 • Quantitative Aptitude • Q60

 Find the value of the following expression.

1+sinθ1−sinθ\sqrt{1+sin\theta\over 1-sin\theta}

Show answer & explanation

Correct answer: A

Explanation

The correct answer is Option 1 i.e. sec θ + tan θ.

⇒ 1+sinθ1−sinθ\sqrt{1+sin\theta\over 1-sin\theta}

⇒ 1+sinθ1−sinθ×1+sinθ1+sinθ\sqrt{{1+sin\theta\over 1-sin\theta} \times {1+sin\theta\over 1+sin\theta}}

⇒ (1+sinθ)212−sin2θ\sqrt{{(1+sin\theta)^2\over 1^2-sin^2\theta}}

⇒ (1+sinθ)2cos2θ\sqrt{{(1+sin\theta)^2\over cos^2\theta}}   [1 - sin2θ = cos2θ]

⇒ (1+sinθ)cosθ(1+sin \theta) \over cos \theta

⇒ 1cosθ+sinθcosθ{1\over cos \theta} + {sin\theta\over cos \theta}

⇒ secθ + tanθ