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 unit circle in trigonometry?
Question 2
On the unit circle, what are the coordinates of the point at angle $0$ radians?
Question 3
What are the coordinates of the point on the unit circle at angle $\frac{\pi}{2}$ radians?
Question 4
If a point on the unit circle has coordinates $\left(\cos\theta,\sin\theta\right)$, what does $\sin\theta$ represent?
Question 5
What is $\cos\left(\pi\right)$?