How Do I Rearrange Variables in Equations for Homework?

[woz]

Hello, the teacher gave us this assignment in which we had to separate some variables from equations. (example: E=mc^2 for m -> m=E/c^2). I had trouble with 4 of them (the ones in the attachment), I would appreciate some help, The procedure is really important since I want to learn how to solve them.

 

[enigma]

Hi woz,

While we're waiting for the attachment to get approved...

Why don't you go ahaid and post what you've tried / where you're stuck on them. It'll help us help you.

 

[Zurtex]

9. Do you know how to complete the square?

10. Can you get thins in terms of \cos \theta and apply \arccos to both sides?

11. Simmilar to 10

15. This seems to be a trick question, the equation isn't dependent on m at all

 

[marlon]

the solution in a word doc

regards
marlon