SSC CGL 2022 PYQ — Question 51

SSC CGL - 05 Dec 2022 - Shift 2 • Quantitative Aptitude • Q51

cos⁡235∘+cos⁡55∘.sin⁡35∘+tan⁡34∘cot⁡56∘\cos^235^ \circ + \cos55^ \circ.\sin 35^\circ + \frac {\tan 34^\circ}{\cot 56^\circ} = _________________

Show answer & explanation

Correct answer: A

Explanation

The correct answer is Option 1 i.e. 2.

Concept Used: 

sin2A + cos2A = 1

cos(90 - A) = sinA

tan(90 - A) = cot A

Explanation:

From the given question,

cos235° + cos55°sin35° + tan340cot560tan34^0 \over cot56^0

⇒ cos235° + cos(90 - 35°)sin35° + tan(90−56)cot560tan(90 - 56) \over cot56^0

⇒ cos235° + sin235° + 1 

⇒ 1 + 1 = 2

Hence the value of  cos235° + cos55°sin35° + tan340cot560tan34^0 \over cot56^0 is 2.