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.GATE CS Original Papers and Official Keys.
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