If `cos 2B =(cos (A+C))/(cos (A-C))` then `tann A,tan B,tanC` are in

If cos 2B=(cos (A+C))/(cos(A-C)) , then tan A , tan B , tan C are in

(c- b cos A )/( b - c cos A ) =

In Delta ABC ,if 5 cos C + 6 cos B = 4 and 6 cos A + 4 cos C = 5 " then " tan A//2 tan B//2 =

In Delta ABC , (a)/( cos A) = (b) /( cos B ) = ( c ) /( cos C ) , If b= 2 then the area of the triangle is

If A+B+C=pi and cos A = cos B cos C " then " cot B cot C =

Statement I: If A+B+C=pi and cos A =cos B cos C then cot B cot C=1/3 Statement II : If 5 sin B=sin (2A+B) then 2tan(A+B)=3 tan A Which of the above statements is correct?

In a=5,b=4 and cos(A-B)=(31)/(32) then tan C/2.

Prove that: (1+ cos (A-B) cos C)/(1+ cos (A-C) cos B) = (a^(2) +b^(2))/(a^(2) + c^(2))