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Introduction to trigonometry
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Trigonometric Ratios For the right ΔABC, right-angled at ∠B, the trigonometric ratios of the ∠A are as follows: sin A=opposite side/hypotenuse=BC/AC cos A=adjacent side/hypotenuse=AB/AC tan A=opposite side/adjacent side=BC/AB cosec A=hypotenuse/opposite side=AC/BC sec A=hypotenuse/adja...
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