1 . If `A + B =pi/4`, show that `(cot A-1) (cot B-1) = 2`

If A + B = (pi)/(4) , show that (cot A - 1) (cot B - 1) = 2 and hence deduce that cot 22^((1^(0))/(2))=sqrt(2)+1.

If A+B=45^(circ) , prove that (cot A-1)(cot B-1) = 2

If A + B = 45^(@), " then " (cot A - 1) ( cot B - 1) is

If A + B + C = pi , show that cot A cot B + cot B cot C + cot C cot A = 1

If A + B = 45^@ , then (cot A-1) (cot B-1) is equal to......... A) 0 B) 2 C) 1 D) 4

Prove that cot^(-1) 7 + 2 cot^(-1)3 = pi/4

If A + B + C = pi " and " cos A = cos B cos C, "show that" 2 cot B cot C = 1

If A+B+C= pi//2 then show that cot A + cot B+ cot C=cot A cot B cot C

If A+B+C =pi , show that cot A + cot B+cot C-cosec A *cosec B* cosec C = cot A*cot B*cot C .

If A + B + C =pi/2 , prove that : cot A + cot B + cot C = cot A cot B cot C .