Math calculators
Trigonometry Calculators
8 tools
Sin, cos, tan, inverse trig, and the general triangle solver. Tools may appear in more than one topic.
Popular in Trigonometry & Triangles
Featured tools from the Family registry.
- Sin Calculator Calculate sine in degrees or radians, or from opposite and hypotenuse lengths. Preserve tiny results, inspect limits and worked steps, and export full inputs.
- Cos Calculator Calculate cosine from degrees, radians, or triangle side ratios. Inspect numerical limits, share precise inputs, export results, and call the REST or MCP API.
- Tan Calculator Calculate tangent in degrees or radians with stable angle reduction, clear pole errors, near-singularity warnings, full-precision exports and shareable results.
All Trigonometry & Triangles
Every live calculator in this family. URLs stay /calc/math/…
- Arccos Calculator Calculate the principal arccosine in degrees and radians. Explore its graph, exact common angles, input limits, worked examples, and NIST reference sources.
- Arcsin Calculator Calculate the principal arcsine in degrees and radians. Explore its graph, exact common angles, input limits, worked examples, and NIST reference sources.
- Arctan Calculator Calculate the principal arctangent in degrees and radians. Explore its graph, exact common angles, rounding limits, worked examples, and NIST references.
- Cos Calculator Calculate cosine from degrees, radians, or triangle side ratios. Inspect numerical limits, share precise inputs, export results, and call the REST or MCP API.
- Pythagorean Theorem Calculator Solve a right triangle with a² + b² = c². Enter any two of legs a, b and hypotenuse c to find the third side, plus area and perimeter. Try it free.
- Sin Calculator Calculate sine in degrees or radians, or from opposite and hypotenuse lengths. Preserve tiny results, inspect limits and worked steps, and export full inputs.
- Tan Calculator Calculate tangent in degrees or radians with stable angle reduction, clear pole errors, near-singularity warnings, full-precision exports and shareable results.
- Triangle Solver Solve triangle sides, angles, area and perimeter with SSS, SAS, ASA, AAS or SSA. Inspect every solution, numerical limits and complete shareable result exports.