Calculus Examples

$y = \sin^{3} (\tan (5 x))$

Step 1

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{3}$ and $g (x) = \sin (\tan (5 x))$ .

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Step 1.1

To apply the Chain Rule, set $u_{1}$ as $\sin (\tan (5 x))$ .

$\frac{d}{d u_{1}} [{u_{1}}^{3}] \frac{d}{d x} [\sin (\tan (5 x))]$

Step 1.2

Differentiate using the Power Rule which states that $\frac{d}{d u_{1}} [{u_{1}}^{n}]$ is $n {u_{1}}^{n - 1}$ where $n = 3$ .

$3 {u_{1}}^{2} \frac{d}{d x} [\sin (\tan (5 x))]$

Step 1.3

Replace all occurrences of $u_{1}$ with $\sin (\tan (5 x))$ .

$3 \sin^{2} (\tan (5 x)) \frac{d}{d x} [\sin (\tan (5 x))]$

Step 2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = \sin (x)$ and $g (x) = \tan (5 x)$ .

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Step 2.1

To apply the Chain Rule, set $u_{2}$ as $\tan (5 x)$ .

$3 \sin^{2} (\tan (5 x)) (\frac{d}{d u_{2}} [\sin (u_{2})] \frac{d}{d x} [\tan (5 x)])$

Step 2.2

The derivative of $\sin (u_{2})$ with respect to $u_{2}$ is $\cos (u_{2})$ .

$3 \sin^{2} (\tan (5 x)) (\cos (u_{2}) \frac{d}{d x} [\tan (5 x)])$

Step 2.3

Replace all occurrences of $u_{2}$ with $\tan (5 x)$ .

$3 \sin^{2} (\tan (5 x)) (\cos (\tan (5 x)) \frac{d}{d x} [\tan (5 x)])$

Step 3

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = \tan (x)$ and $g (x) = 5 x$ .

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Step 3.1

To apply the Chain Rule, set $u_{3}$ as $5 x$ .

$3 \sin^{2} (\tan (5 x)) (\cos (\tan (5 x)) (\frac{d}{d u_{3}} [\tan (u_{3})] \frac{d}{d x} [5 x]))$

Step 3.2

The derivative of $\tan (u_{3})$ with respect to $u_{3}$ is $\sec^{2} (u_{3})$ .

$3 \sin^{2} (\tan (5 x)) (\cos (\tan (5 x)) (\sec^{2} (u_{3}) \frac{d}{d x} [5 x]))$

Step 3.3

Replace all occurrences of $u_{3}$ with $5 x$ .

$3 \sin^{2} (\tan (5 x)) (\cos (\tan (5 x)) (\sec^{2} (5 x) \frac{d}{d x} [5 x]))$

Step 4

Differentiate.

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Step 4.1

Since $5$ is constant with respect to $x$ , the derivative of $5 x$ with respect to $x$ is $5 \frac{d}{d x} [x]$ .

$3 \sin^{2} (\tan (5 x)) (\cos (\tan (5 x)) \sec^{2} (5 x) (5 \frac{d}{d x} [x]))$

Step 4.2

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$3 \sin^{2} (\tan (5 x)) (\cos (\tan (5 x)) \sec^{2} (5 x) (5 \cdot 1))$

Step 4.3

Simplify the expression.

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Step 4.3.1

Multiply $5$ by $1$ .

$3 \sin^{2} (\tan (5 x)) (\cos (\tan (5 x)) \sec^{2} (5 x) \cdot 5)$

Step 4.3.2

Move $5$ to the left of $\cos (\tan (5 x)) \sec^{2} (5 x)$ .

$3 \sin^{2} (\tan (5 x)) (5 \cdot (\cos (\tan (5 x)) \sec^{2} (5 x)))$

Step 5

Simplify.

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Step 5.1

Reorder the factors of $5 \cos (\tan (5 x)) \sec^{2} (5 x)$ .

$3 \sin^{2} (\tan (5 x)) (5 \sec^{2} (5 x) \cos (\tan (5 x)))$

Step 5.2

Rewrite $\sec (5 x)$ in terms of sines and cosines.

$3 \sin^{2} (\tan (5 x)) (5 {(\frac{1}{\cos (5 x)})}^{2} \cos (\tan (5 x)))$

Step 5.3

Apply the product rule to $\frac{1}{\cos (5 x)}$ .

$3 \sin^{2} (\tan (5 x)) (5 \frac{1^{2}}{\cos^{2} (5 x)} \cos (\tan (5 x)))$

Step 5.4

One to any power is one.

$3 \sin^{2} (\tan (5 x)) (5 \frac{1}{\cos^{2} (5 x)} \cos (\tan (5 x)))$

Step 5.5

Combine $5$ and $\frac{1}{\cos^{2} (5 x)}$ .

$3 \sin^{2} (\tan (5 x)) (\frac{5}{\cos^{2} (5 x)} \cos (\tan (5 x)))$

Step 5.6

Combine $\frac{5}{\cos^{2} (5 x)}$ and $\cos (\tan (5 x))$ .

$3 \sin^{2} (\tan (5 x)) \frac{5 \cos (\tan (5 x))}{\cos^{2} (5 x)}$

Step 5.7

Factor $\cos (5 x)$ out of $\cos^{2} (5 x)$ .

$3 \sin^{2} (\tan (5 x)) \frac{5 \cos (\tan (5 x))}{\cos (5 x) \cos (5 x)}$

Step 5.8

Separate fractions.

$3 \sin^{2} (\tan (5 x)) (\frac{5}{\cos (5 x)} \cdot \frac{\cos (\tan (5 x))}{\cos (5 x)})$

Step 5.9

Rewrite $\frac{\cos (\tan (5 x))}{\cos (5 x)}$ as a product.

$3 \sin^{2} (\tan (5 x)) (\frac{5}{\cos (5 x)} (\cos (\tan (5 x)) \frac{1}{\cos (5 x)}))$

Step 5.10

Write $\cos (\tan (5 x))$ as a fraction with denominator $1$ .

$3 \sin^{2} (\tan (5 x)) (\frac{5}{\cos (5 x)} (\frac{\cos (\tan (5 x))}{1} \cdot \frac{1}{\cos (5 x)}))$

Step 5.11

Simplify.

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Step 5.11.1

Divide $\cos (\tan (5 x))$ by $1$ .

$3 \sin^{2} (\tan (5 x)) (\frac{5}{\cos (5 x)} (\cos (\tan (5 x)) \frac{1}{\cos (5 x)}))$

Step 5.11.2

Convert from $\frac{1}{\cos (5 x)}$ to $\sec (5 x)$ .

$3 \sin^{2} (\tan (5 x)) (\frac{5}{\cos (5 x)} (\cos (\tan (5 x)) \sec (5 x)))$

Step 5.12

Separate fractions.

$3 \sin^{2} (\tan (5 x)) (\frac{5}{1} \cdot \frac{1}{\cos (5 x)} (\cos (\tan (5 x)) \sec (5 x)))$

Step 5.13

Convert from $\frac{1}{\cos (5 x)}$ to $\sec (5 x)$ .

$3 \sin^{2} (\tan (5 x)) (\frac{5}{1} \sec (5 x) (\cos (\tan (5 x)) \sec (5 x)))$

Step 5.14

Divide $5$ by $1$ .

$3 \sin^{2} (\tan (5 x)) (5 \sec (5 x) (\cos (\tan (5 x)) \sec (5 x)))$

Step 5.15

Multiply $5 \sec (5 x) (\cos (\tan (5 x)) \sec (5 x))$ .

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Step 5.15.1

Raise $\sec (5 x)$ to the power of $1$ .

$3 \sin^{2} (\tan (5 x)) (5 (\sec^{1} (5 x) \sec (5 x)) \cos (\tan (5 x)))$

Step 5.15.2

Raise $\sec (5 x)$ to the power of $1$ .

$3 \sin^{2} (\tan (5 x)) (5 (\sec^{1} (5 x) \sec^{1} (5 x)) \cos (\tan (5 x)))$

Step 5.15.3

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

$3 \sin^{2} (\tan (5 x)) (5 {\sec (5 x)}^{1 + 1} \cos (\tan (5 x)))$

Step 5.15.4

Add $1$ and $1$ .

$3 \sin^{2} (\tan (5 x)) (5 \sec^{2} (5 x) \cos (\tan (5 x)))$

Step 6

Simplify.

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Step 6.1

Multiply $5$ by $3$ .

$15 \sin^{2} (\tan (5 x)) \sec^{2} (5 x) \cos (\tan (5 x))$

Step 6.2

Reorder the factors of $15 \sin^{2} (\tan (5 x)) \sec^{2} (5 x) \cos (\tan (5 x))$ .

$15 \sec^{2} (5 x) \sin^{2} (\tan (5 x)) \cos (\tan (5 x))$

Step 6.3

Rewrite $\sec (5 x)$ in terms of sines and cosines.

$15 {(\frac{1}{\cos (5 x)})}^{2} \sin^{2} (\tan (5 x)) \cos (\tan (5 x))$

Step 6.4

Apply the product rule to $\frac{1}{\cos (5 x)}$ .

$15 \frac{1^{2}}{\cos^{2} (5 x)} \sin^{2} (\tan (5 x)) \cos (\tan (5 x))$

Step 6.5

One to any power is one.

$15 \frac{1}{\cos^{2} (5 x)} \sin^{2} (\tan (5 x)) \cos (\tan (5 x))$

Step 6.6

Combine $15$ and $\frac{1}{\cos^{2} (5 x)}$ .

$\frac{15}{\cos^{2} (5 x)} \sin^{2} (\tan (5 x)) \cos (\tan (5 x))$

Step 6.7

Combine $\frac{15}{\cos^{2} (5 x)}$ and $\sin^{2} (\tan (5 x))$ .

$\frac{15 \sin^{2} (\tan (5 x))}{\cos^{2} (5 x)} \cos (\tan (5 x))$

Step 6.8

Combine $\frac{15 \sin^{2} (\tan (5 x))}{\cos^{2} (5 x)}$ and $\cos (\tan (5 x))$ .

$\frac{15 \sin^{2} (\tan (5 x)) \cos (\tan (5 x))}{\cos^{2} (5 x)}$

Step 6.9

Multiply by $1$ .

$\frac{15 (\sin^{2} (\tan (5 x)) \cdot 1) \cos (\tan (5 x))}{\cos^{2} (5 x)}$

Step 6.10

Multiply by $1$ .

$\frac{15 (\sin^{2} (\tan (5 x)) \cdot 1) \cos (\tan (5 x))}{\cos^{2} (5 x) \cdot 1}$

Step 6.11

Separate fractions.

$\frac{15 \cdot (1) \cos (\tan (5 x))}{1} \cdot \frac{\sin^{2} (\tan (5 x))}{\cos^{2} (5 x)}$

Step 6.12

Convert from $\frac{1}{\cos^{2} (5 x)}$ to $\sec^{2} (5 x)$ .

$\frac{15 \cdot (1) \cos (\tan (5 x))}{1} (\sin^{2} (\tan (5 x)) \sec^{2} (5 x))$

Step 6.13

Multiply $15$ by $1$ .

$\frac{15 \cos (\tan (5 x))}{1} (\sin^{2} (\tan (5 x)) \sec^{2} (5 x))$

Step 6.14

Divide $15 \cos (\tan (5 x))$ by $1$ .

$15 \cos (\tan (5 x)) \sin^{2} (\tan (5 x)) \sec^{2} (5 x)$