What is a trigonometric identity?

A trigonometric identity is an equation involving trigonometric ratios that is true for all permissible values of the variable.

Which identities should I know?

Know the fundamental identities and use them consistently while simplifying or proving expressions.

Usually simplify one side at a time until it becomes identical to the other side.

ICSE MathematicsClass 10Chapter 21

Chapter 21

Use fundamental trigonometric identities to simplify and prove expressions for ICSE Class 10 Mathematics.

TOPICS

Basic identitiesSimplificationIdentity proofsTrigonometric ratiosAlgebraic manipulation

CHAPTER RESOURCES

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IMPORTANT QUESTIONSExam Prep

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PRACTICE WORKSHEETExercises

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