\(\frac{{\cos 20^\circ }}{{\sin 70^\circ }}\) + \(\frac{{\cos\theta }}{{{\rm{sin}}\left( {90^\circ - \theta } \right)}}\) = _______.

Question

Question

This question was previously asked in

SSC CGL 2022 Tier-I Official Paper (Held On : 06 Dec 2022 Shift 1)

Answer 1

प्रयुक्त अवधारणा:

sin(90 - θ) = cosθ

गणना:

⇒ \(\dfrac{{\cos 20^\circ }}{{\sin 70^\circ }}\) = \(\dfrac{{\sin(90^\circ-20^\circ) }}{{\sin 70^\circ }}\) = 1

⇒ \(\dfrac{{\cos\theta }}{{{\rm{sin}}\left( {90^\circ - \theta } \right)}}\) = \(\dfrac{{\cos\theta }}{{{\cos\theta}}}\) = 1

⇒ 1 + 1 = 2

∴ सही उत्तर विकल्प 2 है।

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