degreesToRadians method
Converts degrees to radians. @param degrees The number of degrees to be converted to radians. @returns The number of radians equal to the inputted number of degrees.
Implementation
double degreesToRadians(double degrees) {
if (degrees is double == false || degrees.isNaN) {
throw ('Error: degrees must be a number');
}
return (degrees * pi / 180);
}