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If 1+sin theta + sin^(2) theta + ...oo= ...

If `1+sin theta + sin^(2) theta + ...oo= 4+2sqrt(3), 0 lt theta lt pi` and `theta != pi/2` , then `theta`

A

`pi/6, pi/3`

B

`pi/3, (5pi)/(6)`

C

`(pi)/(6), (2pi)/(3)`

D

`(pi)/(3), (2pi)/(3)`

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