Sine, Cosine, and Tangent Ratios
11Math39 min
Learning Objective
I can define sine, cosine, and tangent in terms of right triangle ratios.
Lesson Flow
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Guided Notes
Key concepts students will learn:
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For a right triangle, the sine of an angle is the ratio of the opposite side to the hypotenuse.
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SOHCAHTOA is a mnemonic device that helps us remember that sine is opposite over hypotenuse, cosine is adjacent over hypotenuse, and tangent is opposite over adjacent.
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The cosecant, secant, and cotangent functions are the reciprocals of the sine, cosine, and tangent functions, respectively.
Practice
6 questions • Multiple choice & Short answer
Exit Ticket
“In a right triangle, the side opposite angle θ has a length of 8, and the hypotenuse has a length of 17. What is sin(θ)?”
Teacher Guide
Get the complete package:
- Answer keys for all questions
- Differentiation strategies
- Extension activities
- Printable student handouts
