Scalar dot product

Calculate u.v if |u| = 5, |v| = 2 and when angle between the vectors u, v is:

a) 60°
b) 45°
c) 120°

Correct result:

a =  5
b =  7.0711
c =  -5

Solution:

a=5 2 cos60=cosπ/3=0=5
b=5 2 cos45=cosπ/4=0=7.0711
c=5 2 cos120=cos2π/3=0=5



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Two vectors given by its magnitudes and by included angle can be added by our vector sum calculator.
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