I really need help with proving trigonometric identities!

[BootyBae]

can somebody please prove one of these problems for me and explain how they did it!

 

[stapel]

View attachment 5237 can somebody please prove one of these problems for me and explain how they did it!

There are loads of worked examples in your book, in your class notes, and online. Our doing one or two of your homework problems isn't going to make much difference.

Instead, please provide a legible statement of the exercise(s) with which you are having difficulty, along with a clear listing of your efforts so far. Then we can try to figure out where things are going sideways, and reply with useful suggestions. Thank you!