![]() Sin (A + B + C) = sin A cos B cos C + cos A sin B cos C + cos A cos B sin C – sin A sin B sin CĬos (A + B +C) = cos A cos B cos C- cos A sin B sin C – sin A cos B sin C – sin A sin B cos C We discuss here some of the typical trigonometric formulae and identities:įor any angles A, B, C, following results hold true: Students must learn all the standard trigonometric identities as the examiners often frame questions based on the application of these identities. A given identity may be established by reducing either side to the other one, or reducing each side to the same expression, or any other convenient modification. A trigonometric equation is hence an identity if it is true for all values of the angle or angles involved. Trigonometric Identities | IIT JEE Trigonometric Series FormulaĪs the name suggests, an equation is said to be an identity if it holds good in every case. ![]() Concepts of Physics by HC Verma for JEE.IIT JEE Coaching For Foundation Classes.
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