`(tan A + tan B)/( cot A + cot B)+(1- tan A tan B)/( 1- cot A cot B)= `

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

frac(tan A + tan B)(cot A + cot B) is equal to

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

Show that (cot A + tan B) / (cot B + tan A) = cot A. tan B.

(tan A) / (1-cot A) + (cot A) / (1-tan A) = 1 + tan A + cot A = 1 + sec A cos ecA

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

If tan A - tan B = x and cot B - cot A= y, then cot (A-B) is

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

Show that in a Delta ABC (cot B+cot C)/(tan B+tan C)+(cot C+cot A)/(tan C+tan A)+(cot A+cot B)/(tan A+tan B)=1

If tan A - tan B = x and cot A - cot B = y, then cot( A- B) =