prove or disprove this:

sinx + siny= 2sin((x+y)/2)cos((x-y)/2)

Hi, mlcpl123!

We don't do a persons homework for them here. However, if you would like to post how you might work out the problem, then that would be fair.

If you did that, someone might come along to show you how what you did was correct or incorrect and advise you how to make it better for you to learn how to do it.

You also might want to take a look at information that you will find via clicking on the following link.

Ask Me Help Desk - Announcements in Forum : Homework Help

Thanks!