Is there anyone who's willing to help me with this long problem?

Question

ihelpyoulearn · Answer

Could definitely try!

anonymous · Answer

attachment

anonymous · Answer

It's super long and I just can't get it

ihelpyoulearn · Answer

Okay @Lxoftmusic let me check this out for you :)

ihelpyoulearn · Answer

Okay @Lxoftmusic I will stop here with this because I'm already unsure and lost with this looong problem. I'm sorry, but I will be unable to help you out! If you have any other questions/problems just tag me and I can try to help you out :) What a looong problem you have too!

anonymous · Answer

Oh, it's ok I understand, thanks for trying! ^.^

anonymous · Answer

anyone else?

wmj259 · Answer

they used a substitution for x which basically where ever they saw the variable x they plugged in acos(theta).

anonymous · Answer

Could you provide me with an example for the first one? A)?

wmj259 · Answer

Like a random example that uses this substitution?

wmj259 · Answer

Can you tell me the chapter name or method that relates to solving this question?

anonymous · Answer

9.4 Trigonometric Equations

wmj259 · Answer

If this is Precalculus1/2, I have forgotten most of it. I apologize.

anonymous · Answer

Yeah it is. It's alright.

anonymous · Answer

anyone elseee?

anonymous · Answer

anyoooooooone?