Circular Functions Worksheets

Before you begin

Use radians, the unit circle and exact special-angle values.

Worked example

Find the exact value of sin(π/4 radians).

1. Locate the angle on the unit circle.
2. Cosine is the x-coordinate; sine is the y-coordinate.
3. Use the quadrant to determine the sign.

Answer: √2/2

Check your result using the method in the example before moving to the next question.

Choose your level

• Easy: Use first-quadrant special angles.
• Medium: Use other quadrants and basic identities.
• Hard: Solve or combine identities with explicit intervals.

Questions and answer calculations checked on 2026-09-17. How we check worksheets. Free for personal and classroom use.

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Practice next

• Inverse Trigonometric Functions
• Radian Measure
• Polar Coordinates