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If A+B +C=180^(@), then (sin 2A + sin 2B...

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

A

`8sin(A/2)sin(B/2)sin(C/2)`

B

`8cos(A/2)cos(B/2)cos(C/2)`

C

`8sin(A/2)cos(B/2)cos(C/2)`

D

`8cos(A/2)sin(B/2)sin(C/2)`

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