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Quantitative Aptitude ( CCS)

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If A = tan 11° tan 29°, B = 2 cot 61° cot 79°, then :

A = 2B

A = – 2B

2A = B

2A = – B

Explanation:

Given, A = tan 11° tan 29°
And, B = 2 cot 61° cot 79°
Or, B = 2 tan 29° tan 11° = 2A
[? cot (90° – Θ) = tan Θ]
So, 2A = B.

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