State Triple Angle Formulae of Trigonometry.
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For triple angle, the below mentioned trigonometric functions are used:
sin (A + B + C) = sin A cos B cos C + cos A sin B cos C + cos A cos B sin C – sin A sin B sin C.
cos (A + B + C) = cos A cos B cos C – cos A sin B sin C – sin A cos B sin C – sin A sin B cos C.
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Answer:
For triple angle, the below mentioned trigonometric functions are used:
••sin (A + B + C) = sin A cos B cos C + cos A sin B cos C + cos A cos B sin C – sin A sin B sin C.
••cos (A + B + C) = cos A cos B cos C – cos A sin B sin C – sin A cos B sin C – sin A sin B cos C.
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