# Reference Angles and Triangles

In this angles and triangles instructional activity, 10th graders solve 10 different problems that relate to various types of reference angles and triangles. First, they determine the value of sine equal to a number of degrees. Then, students write the cotangent given as a positive acute angle. In addition, they determine the exact value of cotangent for an angle in standard position if a given point lies on its terminal side.

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