सिद्ध कीजिए कि
` tan. (A+B)/2 + tan. (A-B)/2 = (2 sin A)/( cos A + cos B) `

tan ((A + B) / (2)) + tan ((AB) / (2)) = (2sin A) / (cos A + cos B)

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

"Prove that" tan (A+B) - tan (A - B) = (sin2 B)/(cos^(2)B - sin^(2) A).

2tan A tan B = 1rArr (cos (AB)) / (cos (A + B))

If 2 tan A = 3 tan B.show that tan (A - B)= (sin2B)/(5-cos2B)

If 2 tan A=3 tan B, then (sin 2B)/(5-cos 2B) is equal to

If 2 tan A=3 tan B, then (sin 2B)/(5-cos 2B) is equal to

Prove the following identities : tan^(2) A - tan^(2) B = (sin^(2) A - sin^(2) B)/ (cos^(2) A . cos^(2) B)

Show that: tan(A+B).tan(A-B)=(sin^(2)A-sin^(2)B)/(cos^(2)A-sin^(2)B).

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