. nrove that tan A tan B tan c tan D--1 (8 ) * C-D) n i sin (y ), prove that cot a cot B cotycot 8

If A+B+C= (pi)/(2) prove that:m (i) "tan"A tan B +"tan"B tan C +"tan" C tan A =1 (ii) cot A +cot B+ cot C= cot A cot B cot C.

Prove that tan A+2tan2A+4tan4A+8cot8A=cot A

If 2tan A+cot A=tan B then cot A+2tan(A-B)=

If 2tan A+cot A=tan B then cot A+2tan(A-B)=

Prove: (tan A+tan B)/(cot A+cot B)=tan A tan B

If tan A -tan B = x and cot B - cot A = y, prove that cot(A-B)=1/x+1/y

If A, B, C, D be the angle of a quadrilateral, then (tan A + tan B + tan C + tan D)/( cot A + cot B + cot C + cot D) =

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

Prove: (cot A+tan B)/(cot B+tan A)=cot A tan B

tan A-tan B=x and cot A-cot B=y prove that cot(A-B)=(1)/(x)-(1)/(y)