(i) If none of A, B is `pi/2` and `A+B= pi/2`, then `tan A tan B =1`.

If A +B+C= pi and /_C is obtuse then tan A. tan B is

If A > 0, B > 0, and A + B = pi/3 then the maximum value of tan A tan B is

If A > 0, B > 0 and A+B=pi/6 , then the minimum value of tan A + tan B is

If A + B + C = pi and sin(A +C/2)= ksin(C/2) , then tan(A/2).tan(B/2) is equal to

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

If sinA=1/2,cosB=(12)/(13), w h e r e pi < A < (3pi)/2 and (3pi)/2 < B < 2pi , f i n d tan(A-B)

If cosA=-sqrt(3)/2, sinB=-5/13 , where pi/2 lt A lt pi, (3pi)/(2) lt B lt 2pi , find the value of tan(A-B) .

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

If sinA=1/2,cosB=(sqrt(3))/2 , where pi/2 lt A lt pi and 0 lt B lt pi/2 find tan(A+B)

Let A,B,C be the three angles such that A+B+C=pi , tan A.tan B=2 , then find the value of (cos A cos B)/(cos C)