If θ is the angle between the lines AB and AC where A,B,C are the thr – InterviewSolution

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1.	If θ is the angle between the lines AB and AC where A,B,C are the three points with coordinates (1,2,−1),(2,0,3),(3,−1,2) respectively, then √462cosθ=
Answer» If $θ$ is the angle between the lines $A B$ and $A C$ where $A, B, C$ are the three points with coordinates $(1, 2, - 1), (2, 0, 3), (3, - 1, 2)$ respectively, then $\sqrt{462} cos θ =$

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