In `DeltaABC, tan (A-B-C) `=

In an acute angled DeltaABC , if tan (A+B-C) = 1 and sec (B+C-A)=2 , then find the value of cos (4B-3A) .

. In a DeltaABC, If tan (A/2) , tan(B/2), tan (C/2) , are in H.P.,then a,b,c are in

In DeltaABC , tan""((A+B)/(2))*tan""(C)/(2)=

If in DeltaABC, (tan A - tan B)/(tan A + tan B) = (c-b)/c , prove that : A = 60^0 .

In DeltaABC , If x= tan((B-C)/2) tan(A/2),y= tan((C-A)/2)tan(B/2), z=tan((A-B)/2) tan(C/2) , then x+y+z (in terms of x, y, z only) is

In a DeltaABC, tan((A+C)/(2)) = ________.

In a DeltaABC, tanAtanBtanC=9. For such tiangle , if tan^2A+tan^2B+tan^2C=lamda, then

In a DeltaABC , tan.(A)/(2)=(5)/(6) , tan.(C)/(2)=(2)/(5) , then

In DeltaABC, tan B + tanC=5 and tan AtanC=3 , then