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What is the angle between #<1 , -2 , 3 > # and # < -2 , 5 , 1 > #?

1 Answer

A. S. Adikesavan

Feb 22, 2016

116.05 deg, nearly.

Explanation:

Use angle = arc cos ((cross product of the components) / (product of the lengths of the vectors)).
Here, it is arc cos ( #-#9/(#sqrt#14 #sqrt#30))

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