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Lesson Plan: Solving Trigonometric Equations with the Double-Angle Identity Mathematics • 10th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to solve trigonometric equations using the double-angle identity.


Students will be able to

  • find the general solution, or find the solutions given a particular range, to a trigonometric equation that can be simplified using the double-angle identities (or the half-angle identities).


Students should already be familiar with

  • radians,
  • angle sum and difference formulas,
  • double- and half-angle identities.


Students will not cover

  • triple-angle formulas (or higher order).

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