** Final Answer

$\tan\left(y\right)$

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**** Step-by-step Solution **

Problem to solve:

$\frac{d}{dx}\left(x\tan\left(y\right)\right)$

** Specify the solving method

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1

The derivative of a function multiplied by a constant ($\tan\left(y\right)$) is equal to the constant times the derivative of the function

$\tan\left(y\right)\frac{d}{dx}\left(x\right)$

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2

The derivative of the linear function is equal to $1$

$\tan\left(y\right)$

** Final Answer

$\tan\left(y\right)$

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