how to learn trigonometry identities ? any link to guide me?

Question

anonymous · Answer

yeah its quite easy just form some kind of statement

anonymous · Answer

or you can always look at the pattern and try to affix it in your mind and keep it repeating whenever you are doing nothing ...

anonymous · Answer

Which identities?

anonymous · Answer

Prove them all.

anonymous · Answer

Just prove them and derive it from one of the identities: $$\sin ^{2}\theta+\cos ^{2}\theta=1$$

anonymous · Answer

do you know how to find the other identies using this equation or do you want me to show you?

e.mccormick · Answer

The best method I have found is to get a list of identities, then a bunch of proof problems.  Both are available online for free.  Do your best to NOT use the list of identities.  The more you work problems, the less the list is needed, and things slowly become an understanding of how things work and relate.

There are also only a few key identities.  If you know those, the rest are not hard to find.  TeenaMathew listed one of the big ones.  Allong with the reciprocal identities, this is the absolute most important set.  The sum and difference ones are also good to know.  Between all os those, you can work out most any other one needed.

anonymous · Answer

http://tutorial.math.lamar.edu/pdf/Trig_Cheat_Sheet_Reduced.pdf

e.mccormick · Answer

Yah, I like the stuff over at lamar.edu.  The online calculus book is great.