Use implicit differentiation to find $\displaystyle \frac{{{\left.{d}{y}\right.}}}{{{\left.{d}{x}\right.}}}$ given the equation $\displaystyle {\cos{{\left({x}{y}\right)}}}={y}^{{4}}$.

$\displaystyle \frac{{{\left.{d}{y}\right.}}}{{{\left.{d}{x}\right.}}}=$ Preview Question 6