If `A+B+C=pi,` prove that `(tanA)/(tanBdottanC)+(tanB)/(tanAdott a n C)+(tanC)/(tanAdottanB)=tanA+tanB+tanC-2cot A-2cot B-2cot C`

If in a triangleABC show that : (i) tanA+tanB+tanC =tanAtanBtanC.

If A+B=45^(@),"show that"(1+tanA)(1+tanB)=2.

If in a Delta ABC ,tanA+tanB+tanC=6, then cotA cotB cotC=

Prove that : (tanA)/(secA-1)+(tanA)/(secA+1)=2cosecA

Prove that (secA+tanA)/(sec^2 A- tan^2 A)=secA+tanA

If A+B=45^o ,then tanA+tanB+tanAtanB is:

If A+B+C= pi ,prove that cot(A/2)+cot(B/2)+cot(C/2)=cot(A/2)cot(B/2)cot(C/2)

If A , B , C , D are the angles of a quadrilateral, then (tanA+tanB+tanC+tanD)/(cotA+cotB+cotC+cotD)i se q u a lto: tanAtanBtanCtanD cotAcotBcotCcotD tan^2A+tan^2B+tan^2C+tan^2D sumtanAtanBtanC

cotB-cotA=b ,tanA-tanB=a ,find cot(A-B) .

Prove that: (tanA)/((1+tan^2 A )^2) + (cotA)/((1+cot^2 A)^2) = sinA cosA .