API Reference > geometry-core > CartesianGeometry > Angle > trigValuesToHalfAngleTrigValues trigValuesToHalfAngleTrigValues MethodStatic Return cosine, sine, and radians for the half angle of a cosine,sine pair. trigValuesToHalfAngleTrigValues(rCos2A: number, rSin2A: number): TrigValues Parameter Type Description rCos2A number cosine value (scaled by radius) for initial angle. rSin2A number sine value (scaled by radius) for final angle. Returns - TrigValues Defined in core/geometry/src/geometry3d/Angle.ts Line 288 Last Updated: 13 June, 2024