It is given that (1)/(2^(n) "sin" alpha)...

It is given that `(1)/(2^(n) "sin" alpha), 1,2^(n) "sin" alpha` are in A.P. for some value of `alpha`. Let say for n=1, the `alpha` satisfying the above A.P. is `a_(1)` for n =2 the value is `a_(2)` and so on . If `S= sum_(i=1)^(oo) sin alpha_(i)` then the value of S is

A

1

B

`(1)/(2)`

C

2

D

None of these

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The correct Answer is:

A

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