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If sintheta=sin15^(@)+sin45^(@) , where ...

If `sintheta=sin15^(@)+sin45^(@)` , where `0^(@)lt thetalt90^(@),` then `theta` is equal to a)`45^(@)` b)`54^(@)` c)`60^(@)` d)`75^(@)`

A

`45^(@)`

B

`54^(@)`

C

`60^(@)`

D

`75^(@)`

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