If A + B + C = 180° then what is sin 2A – sin 2B – sin 2C equal t – McqOptions

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1.	If A + B + C = 180° then what is sin 2A – sin 2B – sin 2C equal to?
A.	-4 sin A sin B sin C
B.	-4 cos A sin B cos C
C.	-4 cos A cos B sin C
D.	-4 sin A cos B cos C
Answer» E.

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