Calculus Examples

$y = \frac{3 \tan (x)}{2 π - \sin (x)}$

Step 1

Since $3$ is constant with respect to $x$ , the derivative of $\frac{3 \tan (x)}{2 π - \sin (x)}$ with respect to $x$ is $3 \frac{d}{d x} [\frac{\tan (x)}{2 π - \sin (x)}]$ .

$3 \frac{d}{d x} [\frac{\tan (x)}{2 π - \sin (x)}]$

Step 2

Differentiate using the Quotient Rule which states that $\frac{d}{d x} [\frac{f (x)}{g (x)}]$ is $\frac{g (x) \frac{d}{d x} [f (x)] - f (x) \frac{d}{d x} [g (x)]}{{g (x)}^{2}}$ where $f (x) = \tan (x)$ and $g (x) = 2 π - \sin (x)$ .

$3 \frac{(2 π - \sin (x)) \frac{d}{d x} [\tan (x)] - \tan (x) \frac{d}{d x} [2 π - \sin (x)]}{{(2 π - \sin (x))}^{2}}$

Step 3

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

$3 \frac{(2 π - \sin (x)) \sec^{2} (x) - \tan (x) \frac{d}{d x} [2 π - \sin (x)]}{{(2 π - \sin (x))}^{2}}$

Step 4

Differentiate.

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Step 4.1

By the Sum Rule, the derivative of $2 π - \sin (x)$ with respect to $x$ is $\frac{d}{d x} [2 π] + \frac{d}{d x} [- \sin (x)]$ .

$3 \frac{(2 π - \sin (x)) \sec^{2} (x) - \tan (x) (\frac{d}{d x} [2 π] + \frac{d}{d x} [- \sin (x)])}{{(2 π - \sin (x))}^{2}}$

Step 4.2

Since $2 π$ is constant with respect to $x$ , the derivative of $2 π$ with respect to $x$ is $0$ .

$3 \frac{(2 π - \sin (x)) \sec^{2} (x) - \tan (x) (0 + \frac{d}{d x} [- \sin (x)])}{{(2 π - \sin (x))}^{2}}$

Step 4.3

Add $0$ and $\frac{d}{d x} [- \sin (x)]$ .

$3 \frac{(2 π - \sin (x)) \sec^{2} (x) - \tan (x) \frac{d}{d x} [- \sin (x)]}{{(2 π - \sin (x))}^{2}}$

Step 4.4

Since $- 1$ is constant with respect to $x$ , the derivative of $- \sin (x)$ with respect to $x$ is $- \frac{d}{d x} [\sin (x)]$ .

$3 \frac{(2 π - \sin (x)) \sec^{2} (x) - \tan (x) (- \frac{d}{d x} [\sin (x)])}{{(2 π - \sin (x))}^{2}}$

Step 4.5

Multiply.

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Step 4.5.1

Multiply $- 1$ by $- 1$ .

$3 \frac{(2 π - \sin (x)) \sec^{2} (x) + 1 \tan (x) \frac{d}{d x} [\sin (x)]}{{(2 π - \sin (x))}^{2}}$

Step 4.5.2

Multiply $\tan (x)$ by $1$ .

$3 \frac{(2 π - \sin (x)) \sec^{2} (x) + \tan (x) \frac{d}{d x} [\sin (x)]}{{(2 π - \sin (x))}^{2}}$

Step 5

The derivative of $\sin (x)$ with respect to $x$ is $\cos (x)$ .

$3 \frac{(2 π - \sin (x)) \sec^{2} (x) + \tan (x) \cos (x)}{{(2 π - \sin (x))}^{2}}$

Step 6

Combine $3$ and $\frac{(2 π - \sin (x)) \sec^{2} (x) + \tan (x) \cos (x)}{{(2 π - \sin (x))}^{2}}$ .

$\frac{3 ((2 π - \sin (x)) \sec^{2} (x) + \tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7

Simplify.

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Step 7.1

Apply the distributive property.

$\frac{3 (2 π \sec^{2} (x) - \sin (x) \sec^{2} (x) + \tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.2

Apply the distributive property.

$\frac{3 (2 π \sec^{2} (x)) + 3 (- \sin (x) \sec^{2} (x)) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3

Simplify the numerator.

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Step 7.3.1

Simplify each term.

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Step 7.3.1.1

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

$\frac{3 (2 π {(\frac{1}{\cos (x)})}^{2}) + 3 (- \sin (x) \sec^{2} (x)) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.2

Apply the product rule to $\frac{1}{\cos (x)}$ .

$\frac{3 (2 π \frac{1^{2}}{\cos^{2} (x)}) + 3 (- \sin (x) \sec^{2} (x)) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.3

One to any power is one.

$\frac{3 (2 π \frac{1}{\cos^{2} (x)}) + 3 (- \sin (x) \sec^{2} (x)) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.4

Multiply $2 π \frac{1}{\cos^{2} (x)}$ .

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Step 7.3.1.4.1

Combine $\frac{1}{\cos^{2} (x)}$ and $2$ .

$\frac{3 (\frac{2}{\cos^{2} (x)} π) + 3 (- \sin (x) \sec^{2} (x)) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.4.2

Combine $\frac{2}{\cos^{2} (x)}$ and $π$ .

$\frac{3 \frac{2 π}{\cos^{2} (x)} + 3 (- \sin (x) \sec^{2} (x)) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.5

Multiply $3 \frac{2 π}{\cos^{2} (x)}$ .

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Step 7.3.1.5.1

Combine $3$ and $\frac{2 π}{\cos^{2} (x)}$ .

$\frac{\frac{3 (2 π)}{\cos^{2} (x)} + 3 (- \sin (x) \sec^{2} (x)) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.5.2

Multiply $2$ by $3$ .

$\frac{\frac{6 π}{\cos^{2} (x)} + 3 (- \sin (x) \sec^{2} (x)) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.6

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

$\frac{\frac{6 π}{\cos^{2} (x)} + 3 (- \sin (x) {(\frac{1}{\cos (x)})}^{2}) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.7

Apply the product rule to $\frac{1}{\cos (x)}$ .

$\frac{\frac{6 π}{\cos^{2} (x)} + 3 (- \sin (x) \frac{1^{2}}{\cos^{2} (x)}) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.8

One to any power is one.

$\frac{\frac{6 π}{\cos^{2} (x)} + 3 (- \sin (x) \frac{1}{\cos^{2} (x)}) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.9

Combine $\frac{1}{\cos^{2} (x)}$ and $\sin (x)$ .

$\frac{\frac{6 π}{\cos^{2} (x)} + 3 (- \frac{\sin (x)}{\cos^{2} (x)}) + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.10

Multiply $3 (- \frac{\sin (x)}{\cos^{2} (x)})$ .

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Step 7.3.1.10.1

Multiply $- 1$ by $3$ .

$\frac{\frac{6 π}{\cos^{2} (x)} - 3 \frac{\sin (x)}{\cos^{2} (x)} + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.10.2

Combine $- 3$ and $\frac{\sin (x)}{\cos^{2} (x)}$ .

$\frac{\frac{6 π}{\cos^{2} (x)} + \frac{- 3 \sin (x)}{\cos^{2} (x)} + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.11

Move the negative in front of the fraction.

$\frac{\frac{6 π}{\cos^{2} (x)} - \frac{3 \sin (x)}{\cos^{2} (x)} + 3 (\tan (x) \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.12

Rewrite in terms of sines and cosines, then cancel the common factors.

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Step 7.3.1.12.1

Rewrite $3 (\tan (x) \cos (x))$ in terms of sines and cosines.

$\frac{\frac{6 π}{\cos^{2} (x)} - \frac{3 \sin (x)}{\cos^{2} (x)} + 3 (\frac{\sin (x)}{\cos (x)} \cos (x))}{{(2 π - \sin (x))}^{2}}$

Step 7.3.1.12.2

Cancel the common factors.

$\frac{\frac{6 π}{\cos^{2} (x)} - \frac{3 \sin (x)}{\cos^{2} (x)} + 3 \sin (x)}{{(2 π - \sin (x))}^{2}}$

Step 7.3.2

Simplify each term.

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Step 7.3.2.1

Factor $\cos (x)$ out of $\cos^{2} (x)$ .

$\frac{\frac{6 π}{\cos^{2} (x)} - \frac{3 \sin (x)}{\cos (x) \cos (x)} + 3 \sin (x)}{{(2 π - \sin (x))}^{2}}$

Step 7.3.2.2

Separate fractions.

$\frac{\frac{6 π}{\cos^{2} (x)} - (\frac{3}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)}) + 3 \sin (x)}{{(2 π - \sin (x))}^{2}}$

Step 7.3.2.3

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

$\frac{\frac{6 π}{\cos^{2} (x)} - (\frac{3}{\cos (x)} \tan (x)) + 3 \sin (x)}{{(2 π - \sin (x))}^{2}}$

Step 7.3.2.4

Separate fractions.

$\frac{\frac{6 π}{\cos^{2} (x)} - (\frac{3}{1} \cdot \frac{1}{\cos (x)} \tan (x)) + 3 \sin (x)}{{(2 π - \sin (x))}^{2}}$

Step 7.3.2.5

Convert from $\frac{1}{\cos (x)}$ to $\sec (x)$ .

$\frac{\frac{6 π}{\cos^{2} (x)} - (\frac{3}{1} \sec (x) \tan (x)) + 3 \sin (x)}{{(2 π - \sin (x))}^{2}}$

Step 7.3.2.6

Divide $3$ by $1$ .

$\frac{\frac{6 π}{\cos^{2} (x)} - (3 \sec (x) \tan (x)) + 3 \sin (x)}{{(2 π - \sin (x))}^{2}}$

Step 7.3.2.7

Multiply $3$ by $- 1$ .

$\frac{\frac{6 π}{\cos^{2} (x)} - 3 \sec (x) \tan (x) + 3 \sin (x)}{{(2 π - \sin (x))}^{2}}$

Step 7.4

Combine terms.

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Step 7.4.1

Multiply $\frac{\frac{6 π}{\cos^{2} (x)} - 3 \sec (x) \tan (x) + 3 \sin (x)}{{(2 π - \sin (x))}^{2}}$ by $\frac{\cos^{2} (x)}{\cos^{2} (x)}$ .

$\frac{\cos^{2} (x)}{\cos^{2} (x)} \cdot \frac{\frac{6 π}{\cos^{2} (x)} - 3 \sec (x) \tan (x) + 3 \sin (x)}{{(2 π - \sin (x))}^{2}}$

Step 7.4.2

Combine.

$\frac{\cos^{2} (x) (\frac{6 π}{\cos^{2} (x)} - 3 \sec (x) \tan (x) + 3 \sin (x))}{\cos^{2} (x) {(2 π - \sin (x))}^{2}}$

Step 7.4.3

Apply the distributive property.

$\frac{\cos^{2} (x) \frac{6 π}{\cos^{2} (x)} + \cos^{2} (x) (- 3 \sec (x) \tan (x)) + \cos^{2} (x) (3 \sin (x))}{\cos^{2} (x) {(2 π - \sin (x))}^{2}}$

Step 7.4.4

Cancel the common factor of $\cos^{2} (x)$ .

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Step 7.4.4.1

Cancel the common factor.

$\frac{\cos^{2} (x) \frac{6 π}{\cos^{2} (x)} + \cos^{2} (x) (- 3 \sec (x) \tan (x)) + \cos^{2} (x) (3 \sin (x))}{\cos^{2} (x) {(2 π - \sin (x))}^{2}}$

Step 7.4.4.2

Rewrite the expression.

$\frac{6 π + \cos^{2} (x) (- 3 \sec (x) \tan (x)) + \cos^{2} (x) (3 \sin (x))}{\cos^{2} (x) {(2 π - \sin (x))}^{2}}$

Step 7.4.5

Move $3$ to the left of $\cos^{2} (x)$ .

$\frac{6 π + \cos^{2} (x) (- 3 \sec (x) \tan (x)) + 3 \cos^{2} (x) \sin (x)}{\cos^{2} (x) {(2 π - \sin (x))}^{2}}$

Step 7.5

Reorder terms.

$\frac{- 3 \cos^{2} (x) \sec (x) \tan (x) + 3 \cos^{2} (x) \sin (x) + 6 π}{\cos^{2} (x) {(2 π - \sin (x))}^{2}}$