If the vectors `A ,B ,C` of a triangle `A B C` are `(1,2,3),(-1,0,0),(0,1,2),` respectively then find `/_A B Cdot`

If the vertices A,B,C of a triangle ABC are (1,2,3),(-1,0,0) ,(0,1,2) , respectively, then find angleABC .

If the vertices A, B, C of a triangle ABC are (1," "2," "3)," "(1," "0," "0)," "(0," "1," "2) , respectively, then find /_A B C . [/_A B C is the angle between the vectors vec( B A) and vec (B C) .

If the position vectors of the vertices a, B and C of a Triangle ABC be (1, 2, 3), (-1, 0, 0) and (0, 1, 2) respectively then find angleABC .

If the vertices A,B,C of /_ABC are (1,2,3),(-1,0,0),(0,1,2) respectively then cos^(2)B is equal to

The vertices of a triangle ABC are A(0,0),B(2,-1) and C(9,2). Evaluate cos B

The vertices of a triangle ABC are A(0, 0), B(2, -1) and C(9, 2) , find cos B .

Find the angles of a triangle whose vertices are A(0,-1,-2),B(3,1,4) and C(5,7,1)

Find the angles of a triangle whose vertices are A(0,-1,-2),B(3,1,4)and C(5,7,1)