Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If cos A = 3/4, then the value of 16cos 2 (A/2) – 32 sin (A/2) sin (5A/2) is
Text Solution
Verified by ExpertsThe correct answer is:
C
cosA = 
⇒ 16 cos 2 
– 32 sin 
sin 
= 
(cos 2A – cos 3A)
= 
{(2cos 2 A–1) – (4 cos 3 A – 3 cosA)} = 8 
= 3
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