Arduino - 三角函数

您需要在实践中使用三角函数，例如计算运动物体的距离或角速度。Arduino 提供了传统的三角函数 (sin、cos、tan、asin、acos、atan)，可以通过编写其原型来总结。Math.h 包含三角函数的原型。

三角函数精确语法

double sin(double x); //returns sine of x radians
double cos(double y); //returns cosine of y radians
double tan(double x); //returns the tangent of x radians
double acos(double x); //returns A, the angle corresponding to cos (A) = x
double asin(double x); //returns A, the angle corresponding to sin (A) = x
double atan(double x); //returns A, the angle corresponding to tan (A) = x

示例

double sine = sin(2); // approximately 0.90929737091
double cosine = cos(2); // approximately -0.41614685058
double tangent = tan(2); // approximately -2.18503975868