Final Answer
$\tan\left(y\right)$
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Step-by-step Solution
Problem to solve:
$\frac{d}{dx}\left(x\cdot \tan\left(y\right)\right)$
Specify the solving method
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
$\tan\left(y\right)\frac{d}{dx}\left(x\right)$
2
The derivative of the linear function is equal to $1$
$\tan\left(y\right)$
Final Answer
$\tan\left(y\right)$