Unit Circle Labeled With Quadrantal Angles And Values

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Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane. All quadrantal angles are given in radian measure in terms of pi. At each angle, the coordinates are given. These coordinates can be used to find the six trigonometric values/ratios. The x-coordinate is the value of cosine at the given angle and the y-coordinate is the value of sine. From those ratios, the other 4 trigonometric values can be calculated.

Galleries

Unit Circles

Source

Florida Center for Instructional Technology Clipart ETC (Tampa: University of South Florida, 2007)

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