1.

If thevertices A, B, C of a triangle ABC are (1, 2, 3), (–1, 0, 0),(0, 1, 2), respectively, then find ∠ABC.[∠ABC is the angle betweenthe vectorsand]

Answer»

If the
vertices A, B, C of a triangle ABC are (1, 2, 3), (–1, 0, 0),
(0, 1, 2), respectively, then find ∠ABC.
[∠ABC is the angle between
the vectorsand]



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