(cot B cot A+1)/(cot B-cot A)=......

If A=60^(@) and B=30^(@) then prove that: cot(A-B)=(cot A cot B+1)/(cot B-cot A)

In Delta ABC, (cot B + cot C)/(cot C + cot A) = ....

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

a cot A+b cot B+c cot C=

Prove that cot (A + B) = (cot A cot B - 1)/(cot A + cot B)

If A,B ,C are the angle of Delta ABC then cot A .cot B + cot B . "" cot C + cot C.cot A = ............... A) 0 B) 1 C) 2 D) -1

cot A+cot B+cot C

If A +B +C = 90 ^@ then ( cot A+ cot B + cot C) /(cot A cot B cot C ) =

ln Delta ABC,(cot B+cot C)(cot C-cot A)(cot A+cot B)=