Calculus Examples

${\cot (x)}^{\tan (x)}$

Step 1

Use the properties of logarithms to simplify the differentiation.

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Step 1.1

Rewrite ${\cot (x)}^{\tan (x)}$ as $e^{\ln ({\cot (x)}^{\tan (x)})}$ .

$\frac{d}{d x} [e^{\ln ({\cot (x)}^{\tan (x)})}]$

Step 1.2

Expand $\ln ({\cot (x)}^{\tan (x)})$ by moving $\tan (x)$ outside the logarithm.

$\frac{d}{d x} [e^{\tan (x) \ln (\cot (x))}]$

Step 2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = e^{x}$ and $g (x) = \tan (x) \ln (\cot (x))$ .

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Step 2.1

To apply the Chain Rule, set $u_{1}$ as $\tan (x) \ln (\cot (x))$ .

$\frac{d}{d u_{1}} [e^{u_{1}}] \frac{d}{d x} [\tan (x) \ln (\cot (x))]$

Step 2.2

Differentiate using the Exponential Rule which states that $\frac{d}{d u_{1}} [a^{u_{1}}]$ is $a^{u_{1}} \ln (a)$ where $a$ = $e$ .

$e^{u_{1}} \frac{d}{d x} [\tan (x) \ln (\cot (x))]$

Step 2.3

Replace all occurrences of $u_{1}$ with $\tan (x) \ln (\cot (x))$ .

$e^{\tan (x) \ln (\cot (x))} \frac{d}{d x} [\tan (x) \ln (\cot (x))]$

Step 3

Differentiate using the Product Rule which states that $\frac{d}{d x} [f (x) g (x)]$ is $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ where $f (x) = \tan (x)$ and $g (x) = \ln (\cot (x))$ .

$e^{\tan (x) \ln (\cot (x))} (\tan (x) \frac{d}{d x} [\ln (\cot (x))] + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 4

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = \ln (x)$ and $g (x) = \cot (x)$ .

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Step 4.1

To apply the Chain Rule, set $u_{2}$ as $\cot (x)$ .

$e^{\tan (x) \ln (\cot (x))} (\tan (x) (\frac{d}{d u_{2}} [\ln (u_{2})] \frac{d}{d x} [\cot (x)]) + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 4.2

The derivative of $\ln (u_{2})$ with respect to $u_{2}$ is $\frac{1}{u_{2}}$ .

$e^{\tan (x) \ln (\cot (x))} (\tan (x) (\frac{1}{u_{2}} \frac{d}{d x} [\cot (x)]) + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 4.3

Replace all occurrences of $u_{2}$ with $\cot (x)$ .

$e^{\tan (x) \ln (\cot (x))} (\tan (x) (\frac{1}{\cot (x)} \frac{d}{d x} [\cot (x)]) + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 5

Rewrite $\cot (x)$ in terms of sines and cosines.

$e^{\tan (x) \ln (\cot (x))} (\tan (x) (\frac{1}{\frac{\cos (x)}{\sin (x)}} \frac{d}{d x} [\cot (x)]) + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 6

Multiply by the reciprocal of the fraction to divide by $\frac{\cos (x)}{\sin (x)}$ .

$e^{\tan (x) \ln (\cot (x))} (\tan (x) (\frac{\sin (x)}{\cos (x)} \frac{d}{d x} [\cot (x)]) + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 7

Convert from $\frac{\sin (x)}{\cos (x)}$ to $\tan (x)$ .

$e^{\tan (x) \ln (\cot (x))} (\tan (x) (\tan (x) \frac{d}{d x} [\cot (x)]) + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 8

Raise $\tan (x)$ to the power of $1$ .

$e^{\tan (x) \ln (\cot (x))} (\tan^{1} (x) \tan (x) \frac{d}{d x} [\cot (x)] + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 9

Raise $\tan (x)$ to the power of $1$ .

$e^{\tan (x) \ln (\cot (x))} (\tan^{1} (x) \tan^{1} (x) \frac{d}{d x} [\cot (x)] + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 10

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$e^{\tan (x) \ln (\cot (x))} ({\tan (x)}^{1 + 1} \frac{d}{d x} [\cot (x)] + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 11

Add $1$ and $1$ .

$e^{\tan (x) \ln (\cot (x))} (\tan^{2} (x) \frac{d}{d x} [\cot (x)] + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 12

The derivative of $\cot (x)$ with respect to $x$ is $- \csc^{2} (x)$ .

$e^{\tan (x) \ln (\cot (x))} (\tan^{2} (x) (- \csc^{2} (x)) + \ln (\cot (x)) \frac{d}{d x} [\tan (x)])$

Step 13

The derivative of $\tan (x)$ with respect to $x$ is $\sec^{2} (x)$ .

$e^{\tan (x) \ln (\cot (x))} (\tan^{2} (x) (- \csc^{2} (x)) + \ln (\cot (x)) \sec^{2} (x))$

Step 14

Simplify.

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Step 14.1

Apply the distributive property.

$e^{\tan (x) \ln (\cot (x))} (\tan^{2} (x) (- \csc^{2} (x))) + e^{\tan (x) \ln (\cot (x))} (\ln (\cot (x)) \sec^{2} (x))$

Step 14.2

Remove parentheses.

$e^{\tan (x) \ln (\cot (x))} \tan^{2} (x) (- \csc^{2} (x)) + e^{\tan (x) \ln (\cot (x))} \ln (\cot (x)) \sec^{2} (x)$

Step 14.3

Reorder terms.

$- e^{\tan (x) \ln (\cot (x))} \csc^{2} (x) \tan^{2} (x) + e^{\tan (x) \ln (\cot (x))} \sec^{2} (x) \ln (\cot (x))$