ImArgument-func
Get the argument (theta) of a complex.
double ImArgument(complex cX)
cX
Return the argument (theta) of a complex.
imargument(1+1i) = ; // 0.78539816339745 = pi/4 complex c = 0-5i; imargument(c) = ; // -1.5707963267949 = -pi/2