Sine, Cosine, and Tangent Ratios
Grade 11 · Math · 39 min
What's Included
Learning Objective
I can define sine, cosine, and tangent in terms of right triangle ratios.
Warm-Up Video
Professor Dave Explains · 7:18
Trigonometric Functions: Sine, Cosine, Tangent, Cosecant, Secant, and Cotangent
Guided Notes
3 key concepts
- 1
For a right triangle, the sine of an angle is the ratio of the opposite side to the hypotenuse.
- 2
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.
- 3
The cosecant, secant, and cotangent functions are the reciprocals of the sine, cosine, and tangent functions, respectively.
Practice Questions
6 questions · Multiple choice & Short answer
Exit Ticket
Quick comprehension check
“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)?”
Complete Lesson Package
Get all 3 ready-to-use resources:
