Calculus
posted by Jane .
Here's another one  I think that I am starting to understand it.
Find dy/dx by implicit differentiation:
x^7 = cot y
My answer is csc^2y / 7x^6

7x^6 dx=csc y dy
Did you miss the sign? 
I did miss the sign but would the answer be: 7x^6
 
csc^2y 
correct.