Practice - Trigonometric Ratios in the Unit Circle
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Practice Questions
Test your understanding with targeted questions
What is the radius of the unit circle?
💡 Hint: Remember, it's called the unit circle.
What does cos(0°) equal?
💡 Hint: Think about the x-coordinate on the unit circle.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does cos(90°) equal?
💡 Hint: Look at where the angle lands on the unit circle.
True or False: sin(−θ) = sin(θ).
💡 Hint: Think about the symmetry of the sine function.
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Challenge Problems
Push your limits with advanced challenges
Given an angle of 330°, determine the sine and cosine values using the unit circle.
💡 Hint: Consider the reference angle and the quadrant.
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.
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Reference links
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