1.

If A+B+C=180^(@)C then (sin 2A+sin 2B+sin 2C)/(cos A +cos B +cos C-1)=

Answer»

`4cos A//2 COS B//2 cos C//2`
`4 SIN A//2 sin B//2 sin C//2`
`8 cos A//2 cos B//2 cos C//2`
`1+4sin A//2 sin B//2 sin C//2`

Answer :C


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