Question

given a is equal to 60 degree and 30 degree prove that sin a + b is equal to sin a cos b + cos a sin b ​

Answer 1

A = 60 and B = 30

Now, A + B = 60 + 30 = 90

Also, A – B = 60 – 30 = 30

sin (A + B) = sin 90 = 1

sin A cos B + cos A sin B = sin 60 cos 30 + cos 60 sin 30