NischalChaulagai NischalChaulagai

23-12-2020
Mathematics

contestada

Prove This :

sin(A+B)+sin(A−B)=2sinA⋅cosB

Respuesta :

yanayildiz yanayildiz

23-12-2020

Answer:

We know

sin (A + B) = sin A cos B + cos A sin B

sin (A - B) = sin A cos B - cos A sin B

(A + B) + sin (A - B)

= sin A cos B + cos A sin B + sin A cos B - cos A sin B

= sin A cos B + sin A cos B

= 2 sin A cos B

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