Function sin 

pub const fn sin(x: Real) -> Real

Computes the sine of x (in radians).

This is a const fn implementation based on argument reduction followed by a polynomial approximation.

Testing

The following tests have been performed:

• Maximum observed error of ≤ 1 ULP, measured over targeted sweeps near critical points and across a wide dynamic range.
• Edge cases, including ±0, ±π/2, ±π, subnormal numbers, infinity, and NaN.
• Monotonicity testing in both increasing and decreasing regions.
• High-density testing near π/2.
• Testing near multiples of π.
• Hard argument reduction cases.
• Targeted testing across multiple magnitude scales and reduction quadrants.
• Compile-time evaluation via const fn.

This implementation is intended for use in no_std and embedded environments.