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If cosA=3/4, then 32 sin (A/2) sin ((5...

If cosA=3/4, then 32 sin (A/2) sin ((5A) /2)= ------------- (A) √11 (B) -√11 (C) 11 (D) -11

A

11

B

-11

C

12

D

4

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VK JAISWAL ENGLISH-COMPOUND ANGLES-Exercise-5 : Subjective Type Problems
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