I did these through sheer brute force. You may be able to clean it up a bit.
Expand the left side:
and you can hopefully finish this last step.
Hey, need some help with two questions (may be adding more to this thread later). I am finding these problems rather difficult, so an explanation of each step needed would be EXTREMELY HELPFUL!
1.
My attempt:
LHS
= *changed secx to 1/cosx, changed cscx to 1/sinx
= *replaced "1" with pythagrean
This is where I am stuck as to what to do.
2.
My attempt:
LHS
= *changed tanx to sinx/cosx, changed secx into 1/cosx
= * Replaced "1" with pythagrean
Unknown what to do from here.
EDIT: Okay, I just read the rules. My apologies for all with the title involving "help" I should have been more specific. Unknown if possible to change title or not, I do not see a way right now.
What I did in the edit:
Showed my attempts and tried to explain what I was thinking for each step.
EDIT2: K, everything is in LaTeX! Took about 10 minutes extra, but WOW, looks a lot neater and easier to understand! Really glad I read the rules.