API Reference > geometry-core > Curve > Arc3d > radiansToPointAndDerivative radiansToPointAndDerivative Method Evaluate the point and derivative with respect to the angle (in radians) radiansToPointAndDerivative(radians: number, result?: Ray3d): Ray3d Parameter Type Description radians number angular position result Ray3d optional preallocated ray. Returns - Ray3d Defined in curve/Arc3d.ts Line 348 Last Updated: 11 June, 2024