सिद्ध कीजिए की : ` tan A + tan B =(sin(A+B)) /( cos A cos B) `

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

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

If,A,B,C are angles of a triangle and if none of them is equal to (pi)/(2) ,then tan A+tan B+tan C is cot A cotB cot C tan A tan B tan C sin A sin B sin C cos A cos B cos C

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

If tan A=1 and tan B=sqrt(3), evaluate cos A cos B-sin A sin B

It A + B = 90^@ , then (tan A tan B + tan A cot B)/(sin A sec B) - (sin^2 B)/(cos^2 A) is equal to____

Prove that (sin A+sin B)/(cos A+cos B)=tan((A+B)/2)

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

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

Show that tan^2A-tan^2B=(sin^2A-sin^2B)/(cos^2Acos^2B)