Angle between vectors

Find the angle between the given vectors to the nearest tenth of a degree. u = (-22, 11) and v = (16, 20)

Correct result:

A =  0 °

Solution:

u=(22)2+112=11 524.5967 v=162+202=4 4125.6125 s=(22) (16)+(11) (20)=132 A=180πarccos(s/(u v))=180πarccos((132)/(24.5967 25.6125))102.0948=0



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For Basic calculations in analytic geometry is helpful line slope calculator. From coordinates of two points in the plane it calculate slope, normal and parametric line equation(s), slope, directional angle, direction vector, the length of segment, intersections the coordinate axes etc.
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