What is the importance of studying Sine and Cosine Integral?

[Simon Bridge]

Input has to be in radians, not degree. I cannot find out if I can change input to degree or not.

Script programs at the level of Mathematica, Matlab, Octave etc only use radians and so should you.

If you absolutely insist on input in degrees then you need to write out the conversion: $\sin (30^\circ )$ would get typed in as

sin(pi*30/180)

 

[yungman]

Script programs at the level of Mathematica, Matlab, Octave etc only use radians and so should you.

If you absolutely insist on input in degrees then you need to write out the conversion: $\sin (30^\circ )$ would get typed in as

sin(pi*30/180)

Thanks

 

[yungman]

These are pretty fun to study, though other things are as well. They are covered in many advanced calculus books and books on special functions. Most people only want a brief introduction.

Yes, it would be nice if I have time. I am studying antenna theory and only on Cpt.4, I already had to study spherical geometry, Poyncare sphere, wave polarization and now this Sine and Cosine Integral. I know I have to review Gamma and Bessel's functions for the next chapter. At least I gone deeper into those two in the PDE before. It's just hard to study everything. This antenna theory already put the vector calculus through the ringer!