trigonometry.py 文件源码

def sinox3(x):      
    '''(x-sin(x))/(x*x*x)'''
    if (abs(x) > 1e-2):         
        return (x - math.sin(x)) / (x*x*x)          
    else:           
        return 1./6. - x*x / 120. + x*x*x*x / 5040.