Published by:
CGP EDU Academic Team
Published on: August 13, 2026
In a Δ ABC, if sin A cos B = 
and 3tanA = tanB then cot 2 A equals
Text Solution
Verified by ExpertsThe correct answer is:
3
(3)
3 tan A = tan B
⇒ 3 sinAcosB = cosA sinB
⇒ cosA sinB = 
∴ sin (A + B) = 
= 1
∴ A + B = 
& C = 
or B = 
– A
Now
3tanA = tanB
3 tanA = tan(90 ° – A)
⇒ cot 2 A = 3
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