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If you want to appear for any competitive exams after your school then handson knowledge of different trigonometry formulas is essential. Despite the fact that trigonometry does not have any immediate application its application in our everyday lives cant be disregarded. He considered every triangleplanar or sphericalas being inscribed in a circle, so that each side becomes a chord that is, a straight line that connects two points on a curve or surface, as shown by the inscribed triangle abc in. The relationship between angles and length of the sides of the triangle is formulated with the help of trigonometry concepts. The origins of the word trigonometry are two greek words. Trigonometry formulas pdf, trigonometric identities pdf. Trigonometry formulas for class 11 pdf download physicscatalyst.
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