What is the angle between #<0,2,-8> # and #< -2,1,4 >#?

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What is the angle between #<0,2,-8> # and #< -2,1,4 >#?

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Answer 1 · 2016-02-18T05:38:54

130.8 deg, nearly.

Explanation:

Use the formula for scalar (dot) product of two vectors.
The angle is arc cos (cross product if the components)/(product of the lengths of the vectors.
Here it is arc cos( #-#30#/(sqrt68sqrt31#)

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What is the angle between #<0,2,-8> # and #< -2,1,4 >#?

1 Answer

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