# 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 with the x- and y-axes indicated. All quadrantal angles are given in both radian and degree measure. 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.

### Keywords

circles, cot, tangent, degrees, Degree, Sine, Tan, analytic geometry, trigonometry, ratio, quadrants, radian, radians, trig ratios, trig, sin, cos, cosine, sec, csc, special angles, secant, coordinate plane, unit circle, radius of 1, trigonometric functions, quadrantal angles, cosecant, cotangent, 45°### Galleries

Unit Circles### Source

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

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