Question

Trig derivatives!
Hmm.. can someone explain this to me?

Answer 1

So if you want to find dy/dx of sinx+cosy=1, you get
cosx/siny = dy/dx. Why?

Answer 2

The part I dont understand is how to isolate dy/dx by the way

Answer 3

Wait! I figured they were both x. You have x and y, so you use partial derivatives or implicit differentiation.