Angle Between two Vectors
Consider the two non zero vectors a and b , and let theta be the angle between the two vectors, then the angel between the two vectors formula can be derived from the dot product formula,
a . b = |a| |b| cos(theta)
so cosine of angle between two vectors a and b is
cos(theta) = ( a . b ) / (|a| |b|)
theta = arc cos[ (a.b)/ (|a| |b|)
Interactive Graph : 1
Use the Interactive diagram given below to see the angle between vectors in three dimensional view.
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