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

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

A

7

B

8

C

11

D

none of these

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The correct Answer is:
C
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OBJECTIVE RD SHARMA-TRIGONOMETRIC RATIOS AND IDENTITIES-Exercise
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