`versin(A+B)versin(A-B)=(cosA-cosB)^2`

Show that (1+sinA)/(cosA)+(cosB)/(1-sinB)=(2sinA-2sinB)/(sin(A-B)+cosA-cosB)

Show that (1+sinA)/(cosA)+(cosB)/(1-sinB)=(2sinA-2sinB)/(sin(A-B)+cosA-cosB)

Show that (1+sinA)/(cosA)+(cosB)/(1-sinB)=(2sinA-2sinB)/(sin(A-B)+cosA-cosB)

Prove that ((cosA+cosB)/(sinA-sinB))^n+((sinA+sinB)/(cosA-cosB))^n=2cot^n((A-B)/2) or according as n is even or oddrespectively..

For any angles A,B,C. (sin(A-B))/(cosA.cosB)+(sin(B-C))/(cosB.cosC)+(sin(C-A))/(cosC.cosA)=...

Prove the following identity : (sin A-sin B)/(cosA+ cosB)+ (cosA-cosB)/(sinA+sinB)=0 .

Prove that: sin(A+B)+cos(A-B)=(sinA+cosA)(sinB+cosB)

Prove that (sin(B-C))/(cosB cosC)+(sin(C-A))/(cosC cosA)+(sin(A-B))/(cosA cosB) =0 .

Prove that : (sinA+sinB)/(cosA+cosB)= tan frac (A+B)(2) .

Multiply sin(A+B)=sinA cosB+ cos A sinB and sin(A-B)=sinA cosB - cosA sin B