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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the radius of the unit circle?
💡 Hint: Remember, it's called the unit circle.
Question 2
Easy
What does cos(0°) equal?
💡 Hint: Think about the x-coordinate on the unit circle.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does cos(90°) equal?
- 0
- 1
- −1
💡 Hint: Look at where the angle lands on the unit circle.
Question 2
True or False: sin(−θ) = sin(θ).
- True
- False
💡 Hint: Think about the symmetry of the sine function.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given an angle of 330°, determine the sine and cosine values using the unit circle.
💡 Hint: Consider the reference angle and the quadrant.
Question 2
Prove that sin²(θ) + cos²(θ) always equals 1 for any angle θ.
💡 Hint: Map sine and cosine values back to their unit circle coordinates.
Challenge and get performance evaluation