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Trigonometry Calculator
Enter one angle and switch units without losing the value you are working with.
HOW IT WORKS
A focused tool, with the details that matter.
Calculate sine, cosine, and tangent in degrees or radians. Results include enough context to understand what was calculated, not just a number without explanation.
About this tool
What do sine and cosine represent?
On the unit circle, cosine is the horizontal coordinate and sine is the vertical coordinate.
When is tangent undefined?
Tangent is undefined where cosine is zero, including 90° plus integer multiples of 180°.
How are degrees converted to radians?
Multiply degrees by π/180. To convert radians to degrees, multiply by 180/π.