1.

If the vertices A, B, C of a triangle ABC have position vectors (1, 2, 3), (-1, 0, 0), (0, 1, 2) respectively then find ∠ABC (∠ABC is the angle between the vectors BA and BC).

Answer»

If the vertices A, B, C of a triangle ABC have position vectors (1, 2, 3), (-1, 0, 0), (0, 1, 2) respectively then find ABC (ABC is the angle between the vectors BA and BC).



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