The study of trigonometry dates back to the Greeks, where its primary use was in the development of clocks and calenders and in navigation. The word trigonometry is derived from the Greek words: tri'gonon, which translates as triangle, and met'ron, which translate as measure. Thus, trigonometry, is the study of triangle measure. Trigonometry can be a very enjoyable branch of mathematics to study.There are many interesting and useful problems that trigonometry can be used to solve.

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