In an acute angled triangle `ABC, | [tan A, 1, 1] , [1, tan B, 1] , [ 1, 1, tan C]| =`

In an acute angled triangle tan A,1,11,tan B,11,1,tan C]|=

In an acute angled triangle ABC, if tan(A+B-C)=1 and ,sec(B+C-A)=2, find the value of A,B and C.

Number of triangles ABC if tan A=x,tan B=x+1, and tan C=1-x

In an acute angled triangle ABC,if (tan A)/(2)=(tan B)/(3)=(tan C)/(5) then /_ABC is equal to

In an acute angled /_ABC, the minimum value of tan A tan B tan C is

In a right angled triangle ABC, right angled at C, if tan A = 1, then verify that 2 sin A. cos A = 1.

In a right angled triangle ABC, right angled at B, if tan A = 1, then verify that 2 sin A cos A = 1.

In an acute angled triangle ABC, prove that tan^(2)a+tan^(2)B+tan^(2) C ge9 .

Prove that in an acute-angled triangle ABC , tan^(2) frac{A}{2} + tan^(2) frac{B}{2} + tan^(2) frac{C}{2} ge 1