To be able to study Trigonometry successfully, it is recommended that students complete Geometry and Algebra prior to digging in to the course material. Students should also be familiar with the arithmetic of the real number system. It is helpful to have a graphing calculator and graph paper on hand to be able to follow along as well. If one is not available, software available on sites such as GraphCalc or GeoGebra may be helpful. Geometric constructions proposed in the text can be drawn using Geops, free software for performing geometric constructions in the manner of the Ancient Greeks.

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