Problem of the Week

Updated at Sep 2, 2019 4:02 PM

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Sep 16, 2019

How can we solve for the derivative of \(\cot{w}+{w}^{6}\)?

Below is the solution.

\[\frac{d}{dw} \cot{w}+{w}^{6}\]

Use Sum Rule: \(\frac{d}{dx} f(x)+g(x)=(\frac{d}{dx} f(x))+(\frac{d}{dx} g(x))\).

\[(\frac{d}{dw} \cot{w})+(\frac{d}{dw} {w}^{6})\]

Use Trigonometric Differentiation: the derivative of \(\cot{x}\) is \(-\csc^{2}x\).

\[-\csc^{2}w+(\frac{d}{dw} {w}^{6})\]

Use Power Rule: \(\frac{d}{dx} {x}^{n}=n{x}^{n-1}\).

\[6{w}^{5}-\csc^{2}w\]

Done