Trigonometry Calculator

The angle to evaluate the trig functions at, in the unit chosen below. Any value works — negative angles and angles beyond a full turn are reduced automatically.

Special angles like 30° give exact values such as sin = 1/2.

Whether the angle is in degrees or radians. A full circle is 360° = 2π radians, so 180° = π. In radians you can type expressions like pi/6.

Which inverse function to apply: arcsin undoes sine, arccos undoes cosine, arctan undoes tangent. Each returns the angle in its principal range.

The ratio to take the inverse of. For arcsin and arccos it must lie between −1 and 1; arctan accepts any number.