How do you decide which of the 3 cosine double-angle identities you need to use? I think I get how to use each formula, but I just can't figure out when to use which one.

Guest Mar 14, 2017

I'm sure there are people here who can help. :)

Can you give an example of one of your problems?

hectictar  Mar 14, 2017

8 Online Users


New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.