1.

If A = 30° and B = 60°, verify that(i) sin (A + B) = sin A cos B + cos A sin B(ii) cos (A + B) = cos A cos B − sin A sin B

Answer» If A = 30° and B = 60°, verify that



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

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


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