Worksheets — Set 5

Trigonometry · Unit circle and radian measure

Print and write your answers. Use diagrams to show thinking.

Warm-up

1. sin(60°) = ___ 2. cos(π/3) = ___ 3. Unit circle: angle 6π/4. Coordinates ( , ) ___

_See printable PDF for diagram._

Written practice

1. sin(45°) = ___ 2. cos(π/5) = ___ 3. Unit circle: angle 5π/5. Coordinates ( , ) ___ 4. Period of y = sin(4x): ___ 5. Amplitude of y = 8cos x: ___ 6. Solve sin x = √2/2 on [0, 2π). ___ 7. sin(30°) = ___ 8. Unit circle: angle 8π/4. Coordinates ( , ) ___

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More written practice

1. Amplitude of y = 11cos x: ___ 2. Solve sin x = 1/2 on [0, 2π). ___ 3. sin(75°) = ___ 4. Unit circle: angle 11π/5. Coordinates ( , ) ___ 5. Amplitude of y = 14cos x: ___ 6. sin(60°) = ___

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Patterns and rules

1. sin(60°) = ___ 2. cos(π/4) = ___ 3. Unit circle: angle 22π/4. Coordinates ( , ) ___

_See printable PDF for diagram._

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Parent tip: Label unit circle coordinates for key angles