Maximum PC

Does anyone know how to do these (sin(x), cos(x), ln(x)) or other higher transcendals in C? Can't use any librarys, so just good old +-*/. Psuedocode is OK, as long as the math is there for me to see.

http://www.grc.nasa.gov/WWW/Wright/airplane/trig.html

That should do it.

What info do you have that you can work with? There are various methods of determining these values.

The math for approximating sine is below using the Taylor series. (x3 is x to the 3rd power).

sin x = x - x3/3! + x5/5! - x7/7! + ...

http://www.homeschoolmath.net/other_top ... ulator.php

x has to be in radians. Using just the first 4 terms should give you a value accurate to 7 decimal places. You may want to also write functions for raising a value to a power (Yes, this function already exists but its in the math library, same for factorial) as well as factorial.



The following would be a nasty quick and dirty way of approximating it using no math library functions.

I don't know for cosine, tanget, etc. You should be able to come up with a close approximation of them. In regards to the above formula, to get even closer you could do a recursive function im sure but I don't have time to code it out right now.

Thank you so much DaBrain. That's what I wanted, the series, but I did not want a table. Now there are still a few more higher transcendals, like logb x, but I still don't know the series for that, or even if there is one.