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Vectors: magnitude, direction and products

Relate a direction to the positive coordinate axes · Diagrams

Direction angles with the positive axes

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Schematic spatial x,y,z axes with positive unit directions i,j,k from O. OA is vector a; three labelled arcs theta-x, theta-y and theta-z indicate angles to the positive coordinate axes. Spatial angles are not the angles of this screen projection.
Schematic spatial x,y,z axes with positive unit directions i,j,k from O. OA is vector a; three labelled arcs theta-x, theta-y and theta-z indicate angles to the positive coordinate axes. Spatial angles are not the angles of this screen projection.
Schematic spatial x,y,z axes with positive unit directions i,j,k from O. OA is vector a; three labelled arcs theta-x, theta-y and theta-z indicate angles to the positive coordinate axes. Spatial angles are not the angles of this screen projection.
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