Question

given that sin (A+B) = sin A cos B + cos A sin B , find the value of sin 75

Answer 1

Sol:
Given Sin(A+B) = Sin A Cos B + Cos A Sin B.

Sin 75 = Sin ( 45 + 30) = Sin 45 Cos 30 + Cos 45 Sin 30.

Sin 75 = (1 / √2) ( √3 / 2) + (1 / √2) ( 1 / 2) = [ √3 + 1] / 2√2.

Answer 2

HEY , ANSHIKA HERE IS YOUR ANSWER ^_^

●Sin(A+B) = Sin A Cos B + Cos A Sin B. 
●Sin 75 = Sin ( 45 + 30) = Sin 45 Cos 30 + Cos 45 Sin 30. 
◆Sin 75 = (1 / √2) ( √3 / 2) + (1 / √2) ( 1 / 2) = [ √3 + 1] / 2√2.

HAPPY TO HELP !!!!