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IF sintheta=1/2(a+1/a) then the value of...

IF `sintheta=1/2(a+1/a)` then the value of sin 30 is

A

`1/8(a^3+1/a^3)`

B

`3/2(a+1/a)`

C

`-1/2(a^3+1/a^3)`

D

`1/3(a^3+1/a^3)`

Text Solution

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The correct Answer is:
C
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