Trigonometry

Calculate sine, cosine, tangent, cotangent, secant, and cosecant for an angle in degrees, radians, pi-radians, or DMS, with exact unit-circle values when available.

Calculate arcsin, arccos, and arctan values with principal-angle results in degrees and radians, plus domain checks for inverse sine and cosine.

Convert degrees to radians with decimal and pi-based results, plus common-angle references for geometry, trigonometry, and unit-circle work.

Convert radians to degrees from decimal radians or pi expressions, with decimal-degree and DMS-style outputs when supported by the tool.

Solve triangles with the law of sines for ASA, AAS, and SSA cases, including the ambiguous case when two triangle solutions are possible.