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A branch of mathematics which deals with the problems related to right angled triangles. The trigonometry booklet explains the relationships  The document provides background on trigonometry, defines trigonometric functions and ratios, discusses right triangles, and gives several examples of how  The document discusses several topics in trigonometry including: the four quadrants defined by angles between 0-90, 90-180, 180-270, and 270-360 degrees;  Trigonometry - Free download as PDF File (. 1 The word 'trigonometry' is derived from the Greek words 'trigon' and 'metron' which means measuring the sides of a triangle. Third Quadrant: In  Introduction to Trigonometry · 1. **Sine (sin)**: The ratio of the length of the opposite side to the hypotenuse in a right- angled triangle. The six trigonometric ratios for the angle are  basics-of-trigonometry-1225376461383930-8 - Free download as Powerpoint Presentation (. Draw a circle of radius r = 1 centered at the origin. 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