u/sydreadsbook

I am currently studying for the calculus CLEP exam and have hit a pretty major roadblock from which I am not sure how to move forward. I am good with algebra and have previously taken geometry, precalc, and AP calc AB. I am following the Modern States textbook to study and using videos from the organic chemistry tutor as needed. I’m finding most things pretty easy since theyre just a review of AP calc from highschool. What I am struggling with is the trig stuff. I never took trig, and when I did take geometry, that was 8th grade, so 8 years ago at this point. I can fairly easily memorize the derivatives of certain trig functions and how to write the trig functions in basic terms of other trig functions, but where I am getting stumped is the inverse trig functions. I feel like I have to have a whole database of trig knowledge to even begin approaching these since I do not know many of the substitutions for when the trig functions combine (ex. cos(arcsin(x))=sqrt(1-x^2)). I have no clue where to start and I am looking for some guidance. My school only requires a 50% to get the credit, so realistically could I skip this topic and survive the exam. If so, what other areas should I hone in on? If not, where do you suggest I start to master this topic?

I bought one of those boneless couches like a fucking dumbass and I spilling a purple smoothie on it (once again dumbassery). I removed the covers on the couch which in and of itself was a horrible mistake that shit was such a pain omg. But for the corner piece, I had to cut pieces of fabric on the inside in order to get the cover off. Should I have stopped at that point? yes. did i? no, no I did not.
Anyway, I washed the covers and managed to get one of them back onto the ottoman but for the corner one, it looks dumb as fuck now. Obviously this was somewhat to be expected but please someone for the love of god help me figure out how to make this not look like complete shit. The inside piece is mostly foam, i considered trying to safety pin it in the crevice, but I worry about it just ripping the foam.
To be clear, taking the cover off to do anything is NOT an option. It took me nearly an hour to just get the cover back onto one section of the couch. Attached is a picture of what it should look like and what it looks like now.

calculus: can i avoid trig, pls say yes

Help me fix this couch omg I can’t deal with this it’s pissing me off