Unit Circle Explorer
Set an angle in degrees or radians to see its point, coordinates, and trigonometric values.
- Point
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- Coordinates
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- Sine (y)
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- Cosine (x)
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- Tangent (y ÷ x)
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- Angle in degrees
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- Angle in radians
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A QUICK WALKTHROUGH
How to use this tool
- Choose degrees or radians and enter an angle.
- Move the angle slider or edit the value.
- Read the point, coordinates, and sine, cosine, and tangent values.
Coordinates are trigonometry
For an angle θ, the point on the unit circle is (cos θ, sin θ). Tangent is sin θ ÷ cos θ and is undefined when cosine is zero.
GOOD TO KNOW
Common questions
What is the unit circle?
It is a circle with radius 1 centered at the origin. Its points make sine and cosine visible as y and x coordinates.
Why can tangent be undefined?
Tangent divides sine by cosine. At 90° and 270°, cosine is zero.