JavaScript:实现弧度到度算法
/*
*
* Angle in Degree = ( Angle in Radian ) x ( 180 / pi )
*
* Example :
* Question : Convert pi / 2 degree to radian
* So, Angle in Radian = pi / 2
*
* Solution :
* Angle in Degree = ( pi / 2 ) x ( 180 / pi ) = 90
*
* So, pi / 2 radian is equal to 90 degree
*/
/**
* @param {number} radian
* @return {number}
*/
export const radianToDegree = (radian)