grad_to_radian
Convert degrees to radians.
Call:
double grad_to_radian(double grad);
Here : grad is the angle in degrees. The return value is a number in radians.
Convert degrees to radians.
Example. Convert to 180 degree radians:
double result = grad_to_radian(180);
As a result, the result variable will contain the number Pi (3.14....).