- #1

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## Homework Statement

Find the first derivative for

x sin(y) = y cos(x)

## The Attempt at a Solution

x sin(y) = y cos(x)

Product rule on each side:

x cos(y) + sin(y) = -y sin(x) + cos(x)

I'm not sure what to do after that or if if I was even doing it right to begin with.