Calculus Examples

$g (x) = {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 1}$

Step 1

Differentiate using the chain rule, which states that $\frac{d}{d t} [f (g (t))]$ is $f' (g (t)) g' (t)$ where $f (t) = t^{- 1}$ and $g (t) = \frac{1 + \sin (3 t)}{3 - 2 t}$ .

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Step 1.1

To apply the Chain Rule, set $u_{1}$ as $\frac{1 + \sin (3 t)}{3 - 2 t}$ .

$\frac{d}{d u_{1}} [{u_{1}}^{- 1}] \frac{d}{d t} [\frac{1 + \sin (3 t)}{3 - 2 t}]$

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 $n = - 1$ .

$- {u_{1}}^{- 2} \frac{d}{d t} [\frac{1 + \sin (3 t)}{3 - 2 t}]$

Step 1.3

Replace all occurrences of $u_{1}$ with $\frac{1 + \sin (3 t)}{3 - 2 t}$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{d}{d t} [\frac{1 + \sin (3 t)}{3 - 2 t}]$

Step 2

Differentiate using the Quotient Rule which states that $\frac{d}{d t} [\frac{f (t)}{g (t)}]$ is $\frac{g (t) \frac{d}{d t} [f (t)] - f (t) \frac{d}{d t} [g (t)]}{{g (t)}^{2}}$ where $f (t) = 1 + \sin (3 t)$ and $g (t) = 3 - 2 t$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{(3 - 2 t) \frac{d}{d t} [1 + \sin (3 t)] - (1 + \sin (3 t)) \frac{d}{d t} [3 - 2 t]}{{(3 - 2 t)}^{2}}$

Step 3

Differentiate.

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Step 3.1

By the Sum Rule, the derivative of $1 + \sin (3 t)$ with respect to $t$ is $\frac{d}{d t} [1] + \frac{d}{d t} [\sin (3 t)]$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{(3 - 2 t) (\frac{d}{d t} [1] + \frac{d}{d t} [\sin (3 t)]) - (1 + \sin (3 t)) \frac{d}{d t} [3 - 2 t]}{{(3 - 2 t)}^{2}}$

Step 3.2

Since $1$ is constant with respect to $t$ , the derivative of $1$ with respect to $t$ is $0$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{(3 - 2 t) (0 + \frac{d}{d t} [\sin (3 t)]) - (1 + \sin (3 t)) \frac{d}{d t} [3 - 2 t]}{{(3 - 2 t)}^{2}}$

Step 3.3

Add $0$ and $\frac{d}{d t} [\sin (3 t)]$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{(3 - 2 t) \frac{d}{d t} [\sin (3 t)] - (1 + \sin (3 t)) \frac{d}{d t} [3 - 2 t]}{{(3 - 2 t)}^{2}}$

Step 4

Differentiate using the chain rule, which states that $\frac{d}{d t} [f (g (t))]$ is $f' (g (t)) g' (t)$ where $f (t) = \sin (t)$ and $g (t) = 3 t$ .

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Step 4.1

To apply the Chain Rule, set $u_{2}$ as $3 t$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{(3 - 2 t) (\frac{d}{d u_{2}} [\sin (u_{2})] \frac{d}{d t} [3 t]) - (1 + \sin (3 t)) \frac{d}{d t} [3 - 2 t]}{{(3 - 2 t)}^{2}}$

Step 4.2

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

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{(3 - 2 t) (\cos (u_{2}) \frac{d}{d t} [3 t]) - (1 + \sin (3 t)) \frac{d}{d t} [3 - 2 t]}{{(3 - 2 t)}^{2}}$

Step 4.3

Replace all occurrences of $u_{2}$ with $3 t$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{(3 - 2 t) (\cos (3 t) \frac{d}{d t} [3 t]) - (1 + \sin (3 t)) \frac{d}{d t} [3 - 2 t]}{{(3 - 2 t)}^{2}}$

Step 5

Differentiate.

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Step 5.1

Since $3$ is constant with respect to $t$ , the derivative of $3 t$ with respect to $t$ is $3 \frac{d}{d t} [t]$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{(3 - 2 t) \cos (3 t) (3 \frac{d}{d t} [t]) - (1 + \sin (3 t)) \frac{d}{d t} [3 - 2 t]}{{(3 - 2 t)}^{2}}$

Step 5.2

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

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{(3 - 2 t) \cos (3 t) (3 \cdot 1) - (1 + \sin (3 t)) \frac{d}{d t} [3 - 2 t]}{{(3 - 2 t)}^{2}}$

Step 5.3

Simplify the expression.

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Step 5.3.1

Multiply $3$ by $1$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{(3 - 2 t) \cos (3 t) \cdot 3 - (1 + \sin (3 t)) \frac{d}{d t} [3 - 2 t]}{{(3 - 2 t)}^{2}}$

Step 5.3.2

Move $3$ to the left of $(3 - 2 t) \cos (3 t)$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{3 \cdot ((3 - 2 t) \cos (3 t)) - (1 + \sin (3 t)) \frac{d}{d t} [3 - 2 t]}{{(3 - 2 t)}^{2}}$

Step 5.4

By the Sum Rule, the derivative of $3 - 2 t$ with respect to $t$ is $\frac{d}{d t} [3] + \frac{d}{d t} [- 2 t]$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{3 (3 - 2 t) \cos (3 t) - (1 + \sin (3 t)) (\frac{d}{d t} [3] + \frac{d}{d t} [- 2 t])}{{(3 - 2 t)}^{2}}$

Step 5.5

Since $3$ is constant with respect to $t$ , the derivative of $3$ with respect to $t$ is $0$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{3 (3 - 2 t) \cos (3 t) - (1 + \sin (3 t)) (0 + \frac{d}{d t} [- 2 t])}{{(3 - 2 t)}^{2}}$

Step 5.6

Add $0$ and $\frac{d}{d t} [- 2 t]$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{3 (3 - 2 t) \cos (3 t) - (1 + \sin (3 t)) \frac{d}{d t} [- 2 t]}{{(3 - 2 t)}^{2}}$

Step 5.7

Since $- 2$ is constant with respect to $t$ , the derivative of $- 2 t$ with respect to $t$ is $- 2 \frac{d}{d t} [t]$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{3 (3 - 2 t) \cos (3 t) - (1 + \sin (3 t)) (- 2 \frac{d}{d t} [t])}{{(3 - 2 t)}^{2}}$

Step 5.8

Multiply $- 2$ by $- 1$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{3 (3 - 2 t) \cos (3 t) + 2 (1 + \sin (3 t)) \frac{d}{d t} [t]}{{(3 - 2 t)}^{2}}$

Step 5.9

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

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{3 (3 - 2 t) \cos (3 t) + 2 (1 + \sin (3 t)) \cdot 1}{{(3 - 2 t)}^{2}}$

Step 5.10

Multiply $2$ by $1$ .

$- {(\frac{1 + \sin (3 t)}{3 - 2 t})}^{- 2} \frac{3 (3 - 2 t) \cos (3 t) + 2 (1 + \sin (3 t))}{{(3 - 2 t)}^{2}}$

Step 6

Simplify.

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Step 6.1

Apply the product rule to $\frac{1 + \sin (3 t)}{3 - 2 t}$ .

$- \frac{{(1 + \sin (3 t))}^{- 2}}{{(3 - 2 t)}^{- 2}} \cdot \frac{3 (3 - 2 t) \cos (3 t) + 2 (1 + \sin (3 t))}{{(3 - 2 t)}^{2}}$

Step 6.2

Apply the distributive property.

$- \frac{{(1 + \sin (3 t))}^{- 2}}{{(3 - 2 t)}^{- 2}} \cdot \frac{(3 \cdot 3 + 3 (- 2 t)) \cos (3 t) + 2 (1 + \sin (3 t))}{{(3 - 2 t)}^{2}}$

Step 6.3

Apply the distributive property.

$- \frac{{(1 + \sin (3 t))}^{- 2}}{{(3 - 2 t)}^{- 2}} \cdot \frac{3 \cdot 3 \cos (3 t) + 3 (- 2 t) \cos (3 t) + 2 (1 + \sin (3 t))}{{(3 - 2 t)}^{2}}$

Step 6.4

Apply the distributive property.

$- \frac{{(1 + \sin (3 t))}^{- 2}}{{(3 - 2 t)}^{- 2}} \cdot \frac{3 \cdot 3 \cos (3 t) + 3 (- 2 t) \cos (3 t) + 2 \cdot 1 + 2 \sin (3 t)}{{(3 - 2 t)}^{2}}$

Step 6.5

Combine terms.

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Step 6.5.1

Move ${(1 + \sin (3 t))}^{- 2}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$- \frac{1}{{(3 - 2 t)}^{- 2} {(1 + \sin (3 t))}^{2}} \cdot \frac{3 \cdot 3 \cos (3 t) + 3 (- 2 t) \cos (3 t) + 2 \cdot 1 + 2 \sin (3 t)}{{(3 - 2 t)}^{2}}$

Step 6.5.2

Move ${(3 - 2 t)}^{- 2}$ to the numerator using the negative exponent rule $\frac{1}{b^{- n}} = b^{n}$ .

$- \frac{{(3 - 2 t)}^{2}}{{(1 + \sin (3 t))}^{2}} \cdot \frac{3 \cdot 3 \cos (3 t) + 3 (- 2 t) \cos (3 t) + 2 \cdot 1 + 2 \sin (3 t)}{{(3 - 2 t)}^{2}}$

Step 6.5.3

Multiply $3$ by $3$ .

$- \frac{{(3 - 2 t)}^{2}}{{(1 + \sin (3 t))}^{2}} \cdot \frac{9 \cos (3 t) + 3 (- 2 t) \cos (3 t) + 2 \cdot 1 + 2 \sin (3 t)}{{(3 - 2 t)}^{2}}$

Step 6.5.4

Multiply $- 2$ by $3$ .

$- \frac{{(3 - 2 t)}^{2}}{{(1 + \sin (3 t))}^{2}} \cdot \frac{9 \cos (3 t) - 6 t \cos (3 t) + 2 \cdot 1 + 2 \sin (3 t)}{{(3 - 2 t)}^{2}}$

Step 6.5.5

Multiply $2$ by $1$ .

$- \frac{{(3 - 2 t)}^{2}}{{(1 + \sin (3 t))}^{2}} \cdot \frac{9 \cos (3 t) - 6 t \cos (3 t) + 2 + 2 \sin (3 t)}{{(3 - 2 t)}^{2}}$

Step 6.5.6

Multiply $\frac{9 \cos (3 t) - 6 t \cos (3 t) + 2 + 2 \sin (3 t)}{{(3 - 2 t)}^{2}}$ by $\frac{{(3 - 2 t)}^{2}}{{(1 + \sin (3 t))}^{2}}$ .

$- \frac{(9 \cos (3 t) - 6 t \cos (3 t) + 2 + 2 \sin (3 t)) {(3 - 2 t)}^{2}}{{(3 - 2 t)}^{2} {(1 + \sin (3 t))}^{2}}$

Step 6.5.7

Cancel the common factor of ${(3 - 2 t)}^{2}$ .

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Step 6.5.7.1

Cancel the common factor.

$- \frac{(9 \cos (3 t) - 6 t \cos (3 t) + 2 + 2 \sin (3 t)) {(3 - 2 t)}^{2}}{{(3 - 2 t)}^{2} {(1 + \sin (3 t))}^{2}}$

Step 6.5.7.2

Rewrite the expression.

$- \frac{9 \cos (3 t) - 6 t \cos (3 t) + 2 + 2 \sin (3 t)}{{(1 + \sin (3 t))}^{2}}$