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If sintheta,1,cos2theta are in GP ,then ...

If `sintheta,1,cos2theta` are in GP ,then `theta=`

A

`npi+(-1)^(n)(pi)/(2)`

B

`npi+(-1)^(n-1)(pi)/(2)`

C

`2npi`

D

None of these

Text Solution

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The correct Answer is:
B
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