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Lesson Plan: Trigonometric Ratios in Right Triangles Mathematics • Third Year of Preparatory School
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to find and express the values of the three trigonometric ratios—sine, cosine, and tangent—for a given angle in a right triangle.
Objectives
Students will be able to
- find any trigonometric ratios in a right triangle given at least two of its sides,
- find a trigonometric ratio in a right triangle given another trigonometric ratio.
Prerequisites
Students should already be familiar with
- applying the Pythagorean theorem to find a missing side in a right triangle.
Exclusions
Students will not cover
- finding the measure of an angle given the value of a trigonometric ratio,
- finding the length of a side given the value of a trigonometric ratio.
