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If alpha+beta-gamma=pi , then sin^(2)a...

If `alpha+beta-gamma=pi` , then `sin^(2)alpha+sin^(2)beta-sin^(2)gamma=`

A

`2sinalphasinbetacosgamma`

B

`2cosalphacosbetacosgamma`

C

`2sinalphasinbetasingamma`

D

none of these

Text Solution

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The correct Answer is:
A
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