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11.2.3  Draw unit vectors in the plane: Ox_2d_unit_vector Oy_2d_unit_vector frame_2d

The Ox_2d_unit_vector command draws the unit vector in the x-direction on a plane.
Input:

Ox_2d_unit_vector()

Output:

Similarly, the Oy_2d_unit_vector command draws the unit vector in the y direction. The frame_2d command simultaneously draws both unit vectors.


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