Encyclopedia of Trigonometry free ebook download
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First Edition 2007 Trigonometery is the study of triangles. “Tri” is Ancient Greek word for three, “gon” means side, “metry” measurementtogether they make “measuring three sides”. If you know some facts about a triangle, such as the lengths of it sides, then using trignometry you can find out other facts about that triangleits area, its angles, its center, the size of the largest circle that can be drawn inside it. As a consequencethe Ancient Greeks were able to use trigonometery to calculate the distance from the Earth to the Moon.
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