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theta in (0, pi) के ऐसे संभव मान कि sin(...

`theta in (0, pi)` के ऐसे संभव मान कि `sin(theta)+sin(4theta)+sin(7theta)=0` है, हैं :

A

`(2pi)/(9), (pi)/(4), (4pi)/(9), (pi)/(2), (3pi)/(4), (8pi)/(9)`

B

`(pi)/(4), (5pi)/(12), (pi)/(2), (2pi)/(3), (3pi)/(4), (8pi)/(9)`

C

`(2pi)/(9), (pi)/(4), (pi)/(2), (2pi)/(3), (3pi)/(4), ( 35pi)/(36)`

D

`(2pi)/(9), (pi)/(4), (pi)/(2), (2pi)/(3), (3pi)/(4), (8pi)/(9)`

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The correct Answer is:
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