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

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

If A + B + C = pi , show that cot A + sinA/(sin B sin C) = cot B + sin B/(sin C sin A) = cot C + sin C/(sin A sin B)

If A + B + C = pi then show that cot theta = cot A + cot B + cot C ⇔ sin(A - theta) * sin(B - theta)* sin(C - theta) = sin3theta .

If A+B=225 show that (cot A)/(1+cot A)*(cot B)/(1+cot B)=(1)/(2)

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

If A+B=(pi)/(4), prove that: (1+tan A)(1+tan B)=2(cot A-1)(cot B-1)=2

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)