- #1

phrygian

- 80

- 0

## Homework Statement

If x = yz and y = 2sin(y+z), find dx/dy and d^2x/dy^2

## Homework Equations

## The Attempt at a Solution

I am beyond confused at how to even start this one, the problem is not like any of the examples in my book.

I know x = ydz + zdy but don't know how to deal with z and dz?

Thanks for the help