If sinA = sinB and cosA = cosB, then

If sinA+sinB=a and cosA+cosB=b,then cos(A+B)

If sinA+sinB=a and cosA+cosB=b,then cos(A+B)

If sinA+sinB=a and cosA+cosB=b then prove that sin(A+B)=(2ab)/(a^2+b^2) and cos(A+B)=(b^2-a^2)/(a^2+b^2)

If sinA+sinB=a and cosA+cosB=b then prove that sin(A+B)=(2ab)/(a^2+b^2) and cos(A+B)=(b^2-a^2)/(a^2+b^2)

Suppose A and B are two angles such that A,B in(0,pi) and satisfy sinA + sinB = 1 and cosA + cosB = 0. Then the value of 12cos2A + 4cos2B is _______

If sinA=sinB,cosA=cosB , then the value of A in terms of B is

If sinA+sinB=a and cosA+cosB=b, show that cos(A+B) = (b^2-a^2)/(b^2+a^2)

If sinA+sinB=a and cosA+cosB=b, show that sin(A+B) = (2ab)/(b^2+a^2)

If sinA+sinB=a and cosA+cosB=b, show that tan(A+B) = (2ab)/(b^2-a^2)