If A ,B and C are the angles of non-right angle triangle ABC, then find the value of
`|(tanA,1,1),(1,tanB,1),(1,1,tanC)|`

If A,B, and C are the angles of a triangle and |(1,1,1),(1+sinA,1+sinB,1+sinC),(sinA+sin^(2)A,sinB+sin^(2)B,sinC+sin^(2)C)|=0, then triangle ABC is a)Isosceles b)Equilateral c)Right - angled d)None of these

Let A ,B,C, be the three angles such that A+B+C =pi .If tanA*tanB=2 .Then find the value of (cosAcosB)/(cosC) .

In a triangle ABC, if a,b,c are the sides opposite to angles A,B,C respectively,then value of |(bcosC,a,c cosB),(c cosA,b,acosC),(acosB,c,bcosA)| is a)1 b)-1 c)0 d)a cos A + b cos B + cos C

Given A(1,1,1),B(1,2,3),C(2,3,1) are the vertices of triangleABC a triangle. Find the area of the triangleABC .

Consider the triangle ABC with vertices A(1,2,3),B(-1,0,4),C(0,1,2) Find angleA .