Standard Formula sin(A+B) || sin(A–B) || cos(A+B) || cos(A–B)

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

Prove that: (sin(A+B)+sin(A-B))/(cos(A+B)+cos(A-B))=tan A

sin A-sin B and cos A + cos B

If sin A + sin B = I, cos A-cos B = m then cos (AB) =

sin 2A + sin 2B + sin 2 (A-B)= A) 4 sin A * sin B * sin (A-B) B) 4 sin A * cos B * cos (A-B) C) 4 cos A * sin B * cos (A-B) D) 4 cos A * cos B * sin (A-B)

Prove that sin(A+B)sin(A-B)=cos^2B-cos^2A

If A = 30^(@) and B = 60^(@) , verify that sin (A + B) = sin A cos B + cos A sin B.

2sin^(2)B+4cos(A+B)sin A sin B+cos2(A+B)=

Using the formula of sin(A-B)=sin A cos B-cos A sin B find the value of sin15^(@)