Sine, Cosine, and Tangent on the Unit Circle
Grade 11th Grade · Math · 45 min
What's Included
Learning Objective
I can determine the sine, cosine, and tangent of angles using the unit circle.
Warm-Up Video
Professor Dave Explains · 9:48
The Easiest Way to Memorize the Trigonometric Unit Circle
Guided Notes
3 key concepts
- 1
The unit circle is a circle with a radius of one, centered at the origin on the coordinate plane.
- 2
Every point on the unit circle has an X coordinate equal to cosine theta and a Y coordinate equal to sine theta.
- 3
The numerical sequence to remember for sine and cosine values in the first quadrant is root zero over two, root one over two, root two over two, root three over two, and root four over two.
Practice Questions
8 questions · Multiple choice & Short answer
Exit Ticket
Quick comprehension check
“What are the sine, cosine, and tangent of π/4 using the unit circle?”
Complete Lesson Package
Get all 3 ready-to-use resources:
