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Trigonometry The Unit Circle The unit circle is a circle of radius 1 centered at the origin, the point (0, 0). Given a point (x, y) on the perimeter of the unit circle, there is a ray1 from the origin to (x, y). This ray
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Document Date: 2014-05-09 18:48:27
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Triangle geometry
Triangles
Angle
Spherical trigonometry
Trigonometric functions
Sine
Triangle
Radian
Law of cosines
Geometry