## Trigonometric Functions

The library includes its own trigonometric functions in order to provide consistency across platforms and reliable error estimates. These functions are declared in the header file ``gsl_sf_trig.h'`.

- Circular Trigonometric Functions
- Trigonometric Functions for Complex Arguments
- Hyperbolic Trigonometric Functions
- Conversion Functions
- Restriction Functions
- Trigonometric Functions With Error Estimates