Question

what is a good site that actually explains and has examples for different trig identities?

Answer 1

http://tutorial.math.lamar.edu/cheat_table.aspx

Answer 2

thanks but how do u know when to use what?

Answer 3

The short answer is practice.

The main ones (apart from the usual triangle type) are the Pythagorean identities, the sum and difference formulas and the double/half angle formulas.

Most problems involve some combination of those.

Reducing everything to sin and cos is a reasonable strategy starting out....

Answer 4

wow so many trig question are being posted