[Planet Math: An interesting link about mathematics]

#### Trig

Comment: Those online calculators are an excellent resource. I'm impressed. -- Rod Hyde

I'm using derivatives sometimes, but never remember the formulae, so here it goes, a page with them:

You can also try this wonderful online calculator. It calculates derivatives, integrates, finds maximums and minimums, and a lot more things. Just write your problem and let it work for you.

Comment: Those online calculators are an excellent resource. I'm impressed. -- Rod Hyde

How do you get to the math calculator from http://www.mathematics.com? -- Kinsen

Hmm, good question... There are some good calculators on calculator.com, but Im not sure.... -- Jokester