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Compute the sine of any angle in degrees or radians, rounded to six decimal places. Sine gives the opposite/hypotenuse ratio in right triangles and the y-coordinate on the unit circle.
sin(θ) = opposite / hypotenuse — enter degrees or radians, undefined cases flagged.
sin(θ) = opposite / hypotenuse
On the unit circle, sin(θ) is the y-coordinate of the angle's point.
| Symbol | Meaning |
|---|---|
| θ | Angle (degrees or radians) |
sin(30°) = 0.5, sin(90°) = 1, sin(π) = 0 (enter π as 3.14159 in radian mode).
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Content updated: September 2026