Lesson Plan: Simplifying Trigonometric Expressions Using Trigonometric Identities Mathematics • 10th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to simplify trigonometric expressions by applying trigonometric identities.


Students will be able to

  • identify whether an equation represents an identity,
  • recall and use the Pythagorean identities to simplify expressions,
  • use combinations of trigonometric identities, including cofunction identities, shift identities, and Pythagorean identities, to simplify expressions, including reciprocal trigonometric functions,
  • use the trigonometric identities to simplify rational trigonometric expressions.


Students should already be familiar with

  • basic trigonometric identities including the definitions of the tangent function and reciprocal trigonometric functions,
  • complementary function identities and shift identities.


Students will not cover

  • the sum and difference formulas,
  • the double- and half-angle formulas.

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.