PURPOSE: To aid in perception of the components of a three-dimensional vector.
DESCRIPTION: An arbitrary vector in three-dimensional space is shown along with projections along the three orthogonal axes. Observe how the angles alpha, beta, gamma are defined.
SUGGESTIONS: Emphasize that the angle between the vector and any axis is not the same as the angle between the axis and the projection of the vector onto a plane defined by two axes.
REFERENCES: (PIRA 1A40.10)
EQUIPMENT: Direction cosines model, as photographed.
SETUP TIME: None.
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