math.h

/*
 * Copyright (c) 2006-2018, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 */
#ifndef __MATH_H__
#define __MATH_H__

#define M_PI 3.141592653589793238462643

double sin(double x);
double cos(double x);

#endif