Trigonometric Ratios for Double Angles #jeedailyconcepts #trigonometry

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Trigonometric ratios of double angles are the formulas used to find the trigonometric ratios of angles that are double of known angle. There are also special formulae in these that can be used to convert trigonometric ratios of sin/cos to tan.

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correction: cos(a+b) = cosacosb - sinasinb

tirthankarmishra