I''d read a lot of tutorials about math in both 2D and 3D graphics, but there''s always something about "arcCos" and "Cos" and "Sin", "tan" and so on... Would someone please explain what Cos, Sin, arcCos and arcSin mean, in an easy way, so I can continue with the tutorials?

Those are basic concepts in trigonometry, and relate to ratios between lengths of sides of right triangles. If you don''t yet know trig, learn it before you tackle those tutorials.

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Don''t listen to me. I''ve had too much coffee.

But where can I find some online tutorials about trig?
I don''t have trig in my school, therefore I need some tutorials, which can learn me trig...

go into the bibliothek of your school. enough "tutorials" there, for sure.

"take a look around" - limp bizkit
www.google.com

I want ONLINE tutorials, FREE online tutorials, which I can downloade right now.

http://www.google.com/search?q=trigonometry

If you look at the top of this page, you''ll see a link (second from the left in the first row) titled "Articles & Resources." That link takes you to various articles and tutorials and things both hosted on gamedev.net and elsewhere. Go there now!

Other things....

For searches, you should probably use the full name for the trig functions. tan = tangent. cos = cosine. sin = sine. That''ll help you find the appropriate pages easier.

Wolfram''s mathworld site is sometimes useful, and free:

mathworld.wolfram.com

In particular the page on trigonometry would be a good (not great) start:

mathworld.wolfram.com/Trigonometry.html

You should try and ignore the discussion of complex exponentials (equations 8-13 and 16-23 on the page), though. That''ll only confuse you.

Dr. Math might also help:

mathforum.org/dr.math/

Graham Rhodes
Senior Scientist
Applied Research Associates, Inc.

I''ve always found S.O.S. Mathematics (http://www.sosmath.com) to be a great brush-up reference for math topics.

Cheers, dorix

http://aleph0.clarku.edu/~djoyce/java/trig/

I''m assuming you''re in high school, and any high school will have trig (the class may not be called trig though, it''s often part of algebra or sequential math, possibly pre-calculus). If you''re not in high school, talk with the math teachers, they should know trig (if they don''t, run) so even if it''s not taught in a class you can still learn it from them.