3. Geometry and Trigonometry
The Unit Circle — Quiz
Test your understanding of the unit circle with 5 practice questions.
Practice Questions
Question 1
What is the radius of the unit circle?
Question 2
Which equation represents the unit circle in the coordinate plane?
Question 3
What are the coordinates of the point on the unit circle corresponding to an angle of $0$ radians?
Question 4
What are the coordinates of the point on the unit circle corresponding to an angle of $\frac{\pi}{2}$ radians?
Question 5
On the unit circle, what does the $x$-coordinate of a point at angle $\theta$ represent?