How it works
Calculate sine, cosine and tangent of an angle in degrees. Tangent is undefined at odd multiples of 90 degrees.
sin(θ), cos(θ), tan(θ)
Worked example
Show example inputs and result
Angle in degrees: 30.
- Sine
- 0.5
- Cosine
- 0.8660254
- Tangent
- 0.57735027
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy