What is a good website to give me an introduction to triganometry, precalculus and calculus?

I'm in High School.

Personal experience is none of them are as good as a real teacher... particualrly a GOOD teacher.

Better might be to check out math books at the library. In the AP study guides, you would even get tests (but DO NOT write in the library books -- xerox any tests you want to do).

I've taken all three, and smoothy is correct. Books or Internet really won't do it for you. You need a good real-life teacher.

Do you know algebra and geometry?

If you really want something on the Internet, try this --

Khan Academy video classes for Trig and Precalc (https://www.khanacademy.org/math/trigonometry)

Try Khan Academy (http://www.Khanacademy.org) It is used by teachers all over the world and has videos to teach you the steps and help your understanding.

Try Khan Academy (http://www.Khanacademy.org) It is used by teachers all over the world and has videos to teach you the steps and help your understanding.
Yup, that's the link I gave.

Yup, that's the link I gave.
I saw your link, but it didn't say Khan Academy, sorry!

I saw your link, but it didn't say Khan Academy, sorry!
I'll edit it. Great minds think alike.

I'll edit it. Great minds think alike.
Yes, they do.

Great link!! I wish I had known about the academy during my undergrad days. I had a tutor for Algebra 2 and he was no help at all, so I just struggled through the class without understanding the subject matter.

Nice to know the academy has a lot of different courses to get help with, when needed.

Great link!!! I wish I had known about the academy during my undergrad days. I had a tutor for Algebra 2 and he was no help at all, so I just struggled through the class without understanding the subject matter.

Nice to know the academy has a lot of different courses to get help with, when needed.

It's not very old. We were trained to use it as a resource 4 or 5 years ago. It would have helped me, too.

Today on 60 minutes there was a very interesting piece on the Khan Academy. Looks like they want to add other subjects to what they have right now The resources for teachers is pretty cool and will help the teacher keep track of their students level and progress.