यदि $\alpha + \beta - \gamma = \pi ,$ तो ${\sin ^2}\alpha + {\sin ^2}\beta - {\sin ^2}\gamma $ बराबर है
यदि $\alpha + \beta - \gamma = \pi ,$ तो ${\sin ^2}\alpha + {\sin ^2}\beta - {\sin ^2}\gamma $ बराबर है
- [IIT 1980]
- A
$2\,\sin \alpha \,\sin \beta \,\cos \gamma $
- B
$ 2\,\cos \alpha \,\cos \beta \,\cos \gamma$
- C
$2\,\sin \alpha \,\sin \beta \sin \gamma $
- D
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