Calculus Examples

$g (v) = e^{v} \sin (v) - 7 v \csc (v)$

Step 1

By the Sum Rule, the derivative of $e^{v} \sin (v) - 7 v \csc (v)$ with respect to $v$ is $\frac{d}{d v} [e^{v} \sin (v)] + \frac{d}{d v} [- 7 v \csc (v)]$ .

$\frac{d}{d v} [e^{v} \sin (v)] + \frac{d}{d v} [- 7 v \csc (v)]$

Step 2

Evaluate $\frac{d}{d v} [e^{v} \sin (v)]$ .

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Step 2.1

Differentiate using the Product Rule which states that $\frac{d}{d v} [f (v) g (v)]$ is $f (v) \frac{d}{d v} [g (v)] + g (v) \frac{d}{d v} [f (v)]$ where $f (v) = e^{v}$ and $g (v) = \sin (v)$ .

$e^{v} \frac{d}{d v} [\sin (v)] + \sin (v) \frac{d}{d v} [e^{v}] + \frac{d}{d v} [- 7 v \csc (v)]$

Step 2.2

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

$e^{v} \cos (v) + \sin (v) \frac{d}{d v} [e^{v}] + \frac{d}{d v} [- 7 v \csc (v)]$

Step 2.3

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

$e^{v} \cos (v) + \sin (v) e^{v} + \frac{d}{d v} [- 7 v \csc (v)]$

Step 3

Evaluate $\frac{d}{d v} [- 7 v \csc (v)]$ .

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Step 3.1

Since $- 7$ is constant with respect to $v$ , the derivative of $- 7 v \csc (v)$ with respect to $v$ is $- 7 \frac{d}{d v} [v \csc (v)]$ .

$e^{v} \cos (v) + \sin (v) e^{v} - 7 \frac{d}{d v} [v \csc (v)]$

Step 3.2

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

$e^{v} \cos (v) + \sin (v) e^{v} - 7 (v \frac{d}{d v} [\csc (v)] + \csc (v) \frac{d}{d v} [v])$

Step 3.3

The derivative of $\csc (v)$ with respect to $v$ is $- \csc (v) \cot (v)$ .

$e^{v} \cos (v) + \sin (v) e^{v} - 7 (v (- \csc (v) \cot (v)) + \csc (v) \frac{d}{d v} [v])$

Step 3.4

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

$e^{v} \cos (v) + \sin (v) e^{v} - 7 (v (- \csc (v) \cot (v)) + \csc (v) \cdot 1)$

Step 3.5

Multiply $\csc (v)$ by $1$ .

$e^{v} \cos (v) + \sin (v) e^{v} - 7 (v (- \csc (v) \cot (v)) + \csc (v))$

Step 4

Simplify.

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Step 4.1

Apply the distributive property.

$e^{v} \cos (v) + \sin (v) e^{v} - 7 (v (- \csc (v) \cot (v))) - 7 \csc (v)$

Step 4.2

Multiply $- 1$ by $- 7$ .

$e^{v} \cos (v) + \sin (v) e^{v} + 7 v (\csc (v) \cot (v)) - 7 \csc (v)$

Step 4.3

Reorder terms.

$e^{v} \cos (v) + e^{v} \sin (v) + 7 v \cot (v) \csc (v) - 7 \csc (v)$

Step 4.4

Simplify each term.

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Step 4.4.1

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

$e^{v} \cos (v) + e^{v} \sin (v) + 7 v \frac{\cos (v)}{\sin (v)} \csc (v) - 7 \csc (v)$

Step 4.4.2

Multiply $7 v \frac{\cos (v)}{\sin (v)}$ .

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Step 4.4.2.1

Combine $7$ and $\frac{\cos (v)}{\sin (v)}$ .

$e^{v} \cos (v) + e^{v} \sin (v) + v \frac{7 \cos (v)}{\sin (v)} \csc (v) - 7 \csc (v)$

Step 4.4.2.2

Combine $v$ and $\frac{7 \cos (v)}{\sin (v)}$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{v (7 \cos (v))}{\sin (v)} \csc (v) - 7 \csc (v)$

Step 4.4.3

Move $7$ to the left of $v$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 \cdot v \cos (v)}{\sin (v)} \csc (v) - 7 \csc (v)$

Step 4.4.4

Rewrite $\csc (v)$ in terms of sines and cosines.

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v \cos (v)}{\sin (v)} \cdot \frac{1}{\sin (v)} - 7 \csc (v)$

Step 4.4.5

Multiply $\frac{7 v \cos (v)}{\sin (v)} \cdot \frac{1}{\sin (v)}$ .

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Step 4.4.5.1

Multiply $\frac{7 v \cos (v)}{\sin (v)}$ by $\frac{1}{\sin (v)}$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v \cos (v)}{\sin (v) \sin (v)} - 7 \csc (v)$

Step 4.4.5.2

Raise $\sin (v)$ to the power of $1$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v \cos (v)}{\sin^{1} (v) \sin (v)} - 7 \csc (v)$

Step 4.4.5.3

Raise $\sin (v)$ to the power of $1$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v \cos (v)}{\sin^{1} (v) \sin^{1} (v)} - 7 \csc (v)$

Step 4.4.5.4

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

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v \cos (v)}{{\sin (v)}^{1 + 1}} - 7 \csc (v)$

Step 4.4.5.5

Add $1$ and $1$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v \cos (v)}{\sin^{2} (v)} - 7 \csc (v)$

Step 4.4.6

Rewrite $\csc (v)$ in terms of sines and cosines.

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v \cos (v)}{\sin^{2} (v)} - 7 \frac{1}{\sin (v)}$

Step 4.4.7

Combine $- 7$ and $\frac{1}{\sin (v)}$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v \cos (v)}{\sin^{2} (v)} + \frac{- 7}{\sin (v)}$

Step 4.4.8

Move the negative in front of the fraction.

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v \cos (v)}{\sin^{2} (v)} - \frac{7}{\sin (v)}$

Step 4.5

Simplify each term.

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Step 4.5.1

Factor $\sin (v)$ out of $\sin^{2} (v)$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v \cos (v)}{\sin (v) \sin (v)} - \frac{7}{\sin (v)}$

Step 4.5.2

Separate fractions.

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v}{\sin (v)} \cdot \frac{\cos (v)}{\sin (v)} - \frac{7}{\sin (v)}$

Step 4.5.3

Convert from $\frac{\cos (v)}{\sin (v)}$ to $\cot (v)$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v}{\sin (v)} \cot (v) - \frac{7}{\sin (v)}$

Step 4.5.4

Combine $\frac{7 v}{\sin (v)}$ and $\cot (v)$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v \cot (v)}{\sin (v)} - \frac{7}{\sin (v)}$

Step 4.5.5

Separate fractions.

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v}{1} \cdot \frac{\cot (v)}{\sin (v)} - \frac{7}{\sin (v)}$

Step 4.5.6

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

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v}{1} \cdot \frac{\frac{\cos (v)}{\sin (v)}}{\sin (v)} - \frac{7}{\sin (v)}$

Step 4.5.7

Rewrite $\frac{\frac{\cos (v)}{\sin (v)}}{\sin (v)}$ as a product.

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v}{1} (\frac{\cos (v)}{\sin (v)} \cdot \frac{1}{\sin (v)}) - \frac{7}{\sin (v)}$

Step 4.5.8

Simplify.

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Step 4.5.8.1

Convert from $\frac{\cos (v)}{\sin (v)}$ to $\cot (v)$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v}{1} (\cot (v) \frac{1}{\sin (v)}) - \frac{7}{\sin (v)}$

Step 4.5.8.2

Convert from $\frac{1}{\sin (v)}$ to $\csc (v)$ .

$e^{v} \cos (v) + e^{v} \sin (v) + \frac{7 v}{1} (\cot (v) \csc (v)) - \frac{7}{\sin (v)}$

Step 4.5.9

Divide $7 v$ by $1$ .

$e^{v} \cos (v) + e^{v} \sin (v) + 7 v (\cot (v) \csc (v)) - \frac{7}{\sin (v)}$

Step 4.5.10

Separate fractions.

$e^{v} \cos (v) + e^{v} \sin (v) + 7 v (\cot (v) \csc (v)) - (\frac{7}{1} \cdot \frac{1}{\sin (v)})$

Step 4.5.11

Convert from $\frac{1}{\sin (v)}$ to $\csc (v)$ .

$e^{v} \cos (v) + e^{v} \sin (v) + 7 v (\cot (v) \csc (v)) - (\frac{7}{1} \csc (v))$

Step 4.5.12

Divide $7$ by $1$ .

$e^{v} \cos (v) + e^{v} \sin (v) + 7 v (\cot (v) \csc (v)) - (7 \csc (v))$

Step 4.5.13

Multiply $7$ by $- 1$ .

$e^{v} \cos (v) + e^{v} \sin (v) + 7 v (\cot (v) \csc (v)) - 7 \csc (v)$

Step 4.6

Reorder factors in $e^{v} \cos (v) + e^{v} \sin (v) + 7 v (\cot (v) \csc (v)) - 7 \csc (v)$ .

$e^{v} \cos (v) + e^{v} \sin (v) + 7 v \cot (v) \csc (v) - 7 \csc (v)$