Trigonometric Ratios

Grade 1045 min

Learning Objective

I can define sine, cosine, and tangent using the unit circle and apply them to solve problems involving right triangles.

Lesson Flow

Watch Video

10 min

Basic trigonometry | Basic trigonometry | Trigonometry | Khan Academy

Khan Academy

Practice

14 min

7 questions • Short answer

Exit Ticket

5 min

A right triangle has an angle θ such that the length of the opposite side is 6 and the length of the hypotenuse is 10. Calculate the sine, cosine, and tangent of angle θ. Show all work. In a right triangle, one angle measures 45 degrees, and the length of the hypotenuse is 8. Determine the lengths of the opposite and adjacent sides using trigonometric ratios. Show all work.

Teacher Guide

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  • Answer keys for all questions
  • Differentiation strategies
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