I'm the *ahemjonnyahem* from convoy's post, and she's my little sister. She's taking Algebra 2 right now, and she wouldn't know a trig function if you defined it for her. I'm reasonably certain that she would prefer to keep it that way.
And as for Guido, allow me to introduce him to my little friend, Nunzio. I'll just leave them to discuss their differences while I depart to happier climes.