Show that a unit vector in the plane can be expressed as u = (cos )i +
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Show that a unit vector in the plane can be expressed as u = (cos θ)i + (sin θ)j, obtained by rotating i through an angle θ in the counterclockwise direction. Explain why this form gives every unit vector in the plane.
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Thomas Calculus Early Transcendentals
ISBN: 9780321884077
13th Edition
Authors: Joel R Hass, Christopher E Heil, Maurice D Weir
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