Grade 12 · Math
Read exact sine values on the unit circle
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An angle measures π radians. What is its exact sine?
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- 0
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On the unit circle, sine is the vertical coordinate. At π radians that coordinate is 0, so sin(π) = 0.
A little hint: Locate the angle on the unit circle and use its y-coordinate, including the sign.
Measure angles counterclockwise from the positive x-axis, using radians.
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