![]() ![]() sin (2π + A) = sin A & cos (2π + A) = cos A.sin (2π – A) = – sin A & cos (2π – A) = cos A.sin (π + A) = – sin A & cos (π + A) = – cos A.sin (π – A) = sin A & cos (π – A) = – cos A.This period for the repetition of values is different for different trigonometric identities. These are also known as co-function identities.Īll trigonometric identities repeat themselves after a particular period. These identities can be used to shift the angles by π/2, π, 2π, etc. Trigonometry Formulas Chart Periodicity Identities (in Radians) ![]() ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys. ![]()
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