`(sin2A+sin2B)/(sin2A-sin2B)=(tan(A+B))/(tan(A-B))`

(sin2A + sin2B) / (sin2A-sin2B) = (tan (A + B)) / (tan (AB))

Prove that: (sin A+sin B)/(sin A-sin B)=tan((A+B)/2)cot((A-B)/2)

(sin A + sin B) / (sin A-sin B) = tan ((A + B) / (2)) cot ((AB) / (2))

(cos2B-cos2A)/(sin2B+sin2A)=tan(AB)

If sin2A=lambda sin2B prove that ((tan(A+B))/(tan(A-B)))=(lambda+1)/(lambda-1)

Prove that (i) (sin^(2)A cos^(2)B - cos^(2)A sin^(2) B )=(sin^(2)A- sin^(2)B) (ii) (tan^(2)A sec^(2)B - sec^(2)A tan^(2)B)=(tan^(2)A- tan^(2)B)

(cos 2B - cos 2 A)/( sin 2 A + sin 2 B) = tan (A -B).

If sin B=(sin(2A+B))/(5) then (tan(A+B))/(tan A)=?

(tan A + tan B) / (tan A-tan B) = (sin (A + B)) / (sin (AB))

If sin2A=lamdasin2B .Prove that tan(A+B)/(tan(A-B))=(lamda+1)/(lamda-1)