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

∴

Ans: = ∠ABC

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Question

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

Philoid · Accepted Answer

∴

Ans: = ∠ABC

If the position vectors of the verticesA, B and C of a ∆ABC be (1, 2, 3), ( - 1, 0, 0) and (0, 1, 2) respectively then find ∠ABC.