TUC-4+The+Unit+Circle

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The Unit Circle is a circle whose values are counted counterclockwise starting from the point (1,0). It will involve one or more of the six trigonometric functions: sine, cosine, tangent, cosecant, secant, and cotangent as well as the x and y coordinate. The purpose of this lesson is to introduce the reader into constructing generic right triangles with a hypotenuse of 1 in the circle. In this section, answers can be found in either radians or degrees, so be sure that your calculator is in the right mode. =====

 http://www.mathlearning.net/learningtools/Flash/unitCircle/unitCircle.html - interactive unit circle




Review Problems: 1. csc 19pi/6 2. tan 23pi/2 3. sec 713 4. sin -43pi/3