Cálculo Exemplos

$y = \sec (x) \csc (x)$

Etapa 1

Encontre a primeira derivada.

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Etapa 1.1

Diferencie usando a regra do produto, que determina que $\frac{d}{d x} [f (x) g (x)]$ é $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ , em que $f (x) = \sec (x)$ e $g (x) = \csc (x)$ .

$\sec (x) \frac{d}{d x} [\csc (x)] + \csc (x) \frac{d}{d x} [\sec (x)]$

Etapa 1.2

A derivada de $\csc (x)$ em relação a $x$ é $- \csc (x) \cot (x)$ .

$\sec (x) (- \csc (x) \cot (x)) + \csc (x) \frac{d}{d x} [\sec (x)]$

Etapa 1.3

A derivada de $\sec (x)$ em relação a $x$ é $\sec (x) \tan (x)$ .

$\sec (x) (- \csc (x) \cot (x)) + \csc (x) (\sec (x) \tan (x))$

Etapa 1.4

Reordene os termos.

$f' (x) = - \cot (x) \csc (x) \sec (x) + \csc (x) \sec (x) \tan (x)$

Etapa 2

Encontre a segunda derivada.

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Etapa 2.1

De acordo com a regra da soma, a derivada de $- \cot (x) \csc (x) \sec (x) + \csc (x) \sec (x) \tan (x)$ com relação a $x$ é $\frac{d}{d x} [- \cot (x) \csc (x) \sec (x)] + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$ .

$\frac{d}{d x} [- \cot (x) \csc (x) \sec (x)] + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$

Etapa 2.2

Avalie $\frac{d}{d x} [- \cot (x) \csc (x) \sec (x)]$ .

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Etapa 2.2.1

Como $- 1$ é constante em relação a $x$ , a derivada de $- \cot (x) \csc (x) \sec (x)$ em relação a $x$ é $- \frac{d}{d x} [\cot (x) \csc (x) \sec (x)]$ .

$- \frac{d}{d x} [\cot (x) \csc (x) \sec (x)] + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$

Etapa 2.2.2

Diferencie usando a regra do produto, que determina que $\frac{d}{d x} [f (x) g (x)]$ é $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ , em que $f (x) = \cot (x) \csc (x)$ e $g (x) = \sec (x)$ .

$- (\cot (x) \csc (x) \frac{d}{d x} [\sec (x)] + \sec (x) \frac{d}{d x} [\cot (x) \csc (x)]) + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$

Etapa 2.2.3

A derivada de $\sec (x)$ em relação a $x$ é $\sec (x) \tan (x)$ .

$- (\cot (x) \csc (x) (\sec (x) \tan (x)) + \sec (x) \frac{d}{d x} [\cot (x) \csc (x)]) + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$

Etapa 2.2.4

Diferencie usando a regra do produto, que determina que $\frac{d}{d x} [f (x) g (x)]$ é $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ , em que $f (x) = \cot (x)$ e $g (x) = \csc (x)$ .

$- (\cot (x) \csc (x) (\sec (x) \tan (x)) + \sec (x) (\cot (x) \frac{d}{d x} [\csc (x)] + \csc (x) \frac{d}{d x} [\cot (x)])) + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$

Etapa 2.2.5

A derivada de $\csc (x)$ em relação a $x$ é $- \csc (x) \cot (x)$ .

$- (\cot (x) \csc (x) (\sec (x) \tan (x)) + \sec (x) (\cot (x) (- \csc (x) \cot (x)) + \csc (x) \frac{d}{d x} [\cot (x)])) + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$

Etapa 2.2.6

A derivada de $\cot (x)$ em relação a $x$ é $- \csc^{2} (x)$ .

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

Etapa 2.2.7

Eleve $\cot (x)$ à potência de $1$ .

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) (\cot^{1} (x) \cot (x)) + \csc (x) (- \csc^{2} (x)))) + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$

Etapa 2.2.8

Eleve $\cot (x)$ à potência de $1$ .

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) (\cot^{1} (x) \cot^{1} (x)) + \csc (x) (- \csc^{2} (x)))) + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$

Etapa 2.2.9

Use a regra da multiplicação de potências $a^{m} a^{n} = a^{m + n}$ para combinar expoentes.

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) {\cot (x)}^{1 + 1} + \csc (x) (- \csc^{2} (x)))) + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$

Etapa 2.2.10

Some $1$ e $1$ .

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

Etapa 2.2.11

Eleve $\csc (x)$ à potência de $1$ .

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot^{2} (x) - (\csc^{1} (x) \csc^{2} (x)))) + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$

Etapa 2.2.12

Use a regra da multiplicação de potências $a^{m} a^{n} = a^{m + n}$ para combinar expoentes.

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot^{2} (x) - {\csc (x)}^{1 + 2})) + \frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$

Etapa 2.2.13

Some $1$ e $2$ .

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

Etapa 2.3

Avalie $\frac{d}{d x} [\csc (x) \sec (x) \tan (x)]$ .

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Etapa 2.3.1

Diferencie usando a regra do produto, que determina que $\frac{d}{d x} [f (x) g (x)]$ é $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ , em que $f (x) = \csc (x) \sec (x)$ e $g (x) = \tan (x)$ .

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

Etapa 2.3.2

A derivada de $\tan (x)$ em relação a $x$ é $\sec^{2} (x)$ .

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

Etapa 2.3.3

Diferencie usando a regra do produto, que determina que $\frac{d}{d x} [f (x) g (x)]$ é $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ , em que $f (x) = \csc (x)$ e $g (x) = \sec (x)$ .

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

Etapa 2.3.4

A derivada de $\sec (x)$ em relação a $x$ é $\sec (x) \tan (x)$ .

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

Etapa 2.3.5

A derivada de $\csc (x)$ em relação a $x$ é $- \csc (x) \cot (x)$ .

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot^{2} (x) - \csc^{3} (x))) + \csc (x) \sec (x) \sec^{2} (x) + \tan (x) (\csc (x) (\sec (x) \tan (x)) + \sec (x) (- \csc (x) \cot (x)))$

Etapa 2.3.6

Multiplique $\sec (x)$ por $\sec^{2} (x)$ somando os expoentes.

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Etapa 2.3.6.1

Mova $\sec^{2} (x)$ .

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot^{2} (x) - \csc^{3} (x))) + \csc (x) (\sec^{2} (x) \sec (x)) + \tan (x) (\csc (x) (\sec (x) \tan (x)) + \sec (x) (- \csc (x) \cot (x)))$

Etapa 2.3.6.2

Multiplique $\sec^{2} (x)$ por $\sec (x)$ .

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Etapa 2.3.6.2.1

Eleve $\sec (x)$ à potência de $1$ .

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot^{2} (x) - \csc^{3} (x))) + \csc (x) (\sec^{2} (x) \sec^{1} (x)) + \tan (x) (\csc (x) (\sec (x) \tan (x)) + \sec (x) (- \csc (x) \cot (x)))$

Etapa 2.3.6.2.2

Use a regra da multiplicação de potências $a^{m} a^{n} = a^{m + n}$ para combinar expoentes.

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot^{2} (x) - \csc^{3} (x))) + \csc (x) {\sec (x)}^{2 + 1} + \tan (x) (\csc (x) (\sec (x) \tan (x)) + \sec (x) (- \csc (x) \cot (x)))$

Etapa 2.3.6.3

Some $2$ e $1$ .

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot^{2} (x) - \csc^{3} (x))) + \csc (x) \sec^{3} (x) + \tan (x) (\csc (x) (\sec (x) \tan (x)) + \sec (x) (- \csc (x) \cot (x)))$

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot^{2} (x) - \csc^{3} (x))) + \csc (x) \sec^{3} (x) + \tan (x) (\csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4

Simplifique.

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Etapa 2.4.1

Aplique a propriedade distributiva.

$- (\cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot^{2} (x)) + \sec (x) (- \csc^{3} (x))) + \csc (x) \sec^{3} (x) + \tan (x) (\csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4.2

Aplique a propriedade distributiva.

$- (\cot (x) \csc (x) \sec (x) \tan (x)) - (\sec (x) (- \csc (x) \cot^{2} (x))) - (\sec (x) (- \csc^{3} (x))) + \csc (x) \sec^{3} (x) + \tan (x) (\csc (x) \sec (x) \tan (x) + \sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4.3

Aplique a propriedade distributiva.

$- (\cot (x) \csc (x) \sec (x) \tan (x)) - (\sec (x) (- \csc (x) \cot^{2} (x))) - (\sec (x) (- \csc^{3} (x))) + \csc (x) \sec^{3} (x) + \tan (x) (\csc (x) \sec (x) \tan (x)) + \tan (x) (\sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4.4

Combine os termos.

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Etapa 2.4.4.1

Multiplique $- 1$ por $- 1$ .

$- \cot (x) \csc (x) \sec (x) \tan (x) + 1 (\sec (x) (\csc (x) \cot^{2} (x))) - (\sec (x) (- \csc^{3} (x))) + \csc (x) \sec^{3} (x) + \tan (x) (\csc (x) \sec (x) \tan (x)) + \tan (x) (\sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4.4.2

Multiplique $\sec (x)$ por $1$ .

$- \cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) (\csc (x) \cot^{2} (x)) - (\sec (x) (- \csc^{3} (x))) + \csc (x) \sec^{3} (x) + \tan (x) (\csc (x) \sec (x) \tan (x)) + \tan (x) (\sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4.4.3

Multiplique $- 1$ por $- 1$ .

$- \cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) \csc (x) \cot^{2} (x) + 1 (\sec (x) (\csc^{3} (x))) + \csc (x) \sec^{3} (x) + \tan (x) (\csc (x) \sec (x) \tan (x)) + \tan (x) (\sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4.4.4

Multiplique $\sec (x)$ por $1$ .

$- \cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) \csc (x) \cot^{2} (x) + \sec (x) \csc^{3} (x) + \csc (x) \sec^{3} (x) + \tan (x) (\csc (x) \sec (x) \tan (x)) + \tan (x) (\sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4.4.5

Eleve $\tan (x)$ à potência de $1$ .

$- \cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) \csc (x) \cot^{2} (x) + \sec (x) \csc^{3} (x) + \csc (x) \sec^{3} (x) + \tan^{1} (x) \tan (x) (\csc (x) \sec (x)) + \tan (x) (\sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4.4.6

Eleve $\tan (x)$ à potência de $1$ .

$- \cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) \csc (x) \cot^{2} (x) + \sec (x) \csc^{3} (x) + \csc (x) \sec^{3} (x) + \tan^{1} (x) \tan^{1} (x) (\csc (x) \sec (x)) + \tan (x) (\sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4.4.7

Use a regra da multiplicação de potências $a^{m} a^{n} = a^{m + n}$ para combinar expoentes.

$- \cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) \csc (x) \cot^{2} (x) + \sec (x) \csc^{3} (x) + \csc (x) \sec^{3} (x) + {\tan (x)}^{1 + 1} (\csc (x) \sec (x)) + \tan (x) (\sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4.4.8

Some $1$ e $1$ .

$- \cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) \csc (x) \cot^{2} (x) + \sec (x) \csc^{3} (x) + \csc (x) \sec^{3} (x) + \tan^{2} (x) (\csc (x) \sec (x)) + \tan (x) (\sec (x) (- \csc (x) \cot (x)))$

Etapa 2.4.4.9

Reordene os fatores de $\tan (x) \sec (x) (- \csc (x) \cot (x))$ .

$- \cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) \csc (x) \cot^{2} (x) + \sec (x) \csc^{3} (x) + \csc (x) \sec^{3} (x) + \tan^{2} (x) \csc (x) \sec (x) - \cot (x) \csc (x) \sec (x) \tan (x)$

Etapa 2.4.4.10

Subtraia $\cot (x) \csc (x) \sec (x) \tan (x)$ de $- \cot (x) \csc (x) \sec (x) \tan (x)$ .

$- 2 \cot (x) \csc (x) \sec (x) \tan (x) + \sec (x) \csc (x) \cot^{2} (x) + \sec (x) \csc^{3} (x) + \csc (x) \sec^{3} (x) + \tan^{2} (x) \csc (x) \sec (x)$

Etapa 2.4.5

Reordene os termos.

$- 2 \cot (x) \csc (x) \sec (x) \tan (x) + \cot^{2} (x) \csc (x) \sec (x) + \csc^{3} (x) \sec (x) + \sec^{3} (x) \csc (x) + \tan^{2} (x) \csc (x) \sec (x)$

Etapa 2.4.6

Simplifique cada termo.

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Etapa 2.4.6.1

Reescreva $\tan (x)$ em termos de senos e cossenos.

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

Etapa 2.4.6.2

Reescreva $\csc (x)$ em termos de senos e cossenos.

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

Etapa 2.4.6.3

Aplique a regra do produto a $\frac{\sin (x)}{\cos (x)}$ .

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

Etapa 2.4.6.4

Cancele o fator comum de $\sin (x)$ .

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Etapa 2.4.6.4.1

Fatore $\sin (x)$ de $\sin^{2} (x)$ .

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

Etapa 2.4.6.4.2

Cancele o fator comum.

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

Etapa 2.4.6.4.3

Reescreva a expressão.

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

Etapa 2.4.6.5

Fatore $\cos (x)$ de $\cos^{2} (x)$ .

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

Etapa 2.4.6.6

Separe as frações.

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

Etapa 2.4.6.7

Converta de $\frac{\sin (x)}{\cos (x)}$ em $\tan (x)$ .

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

Etapa 2.4.6.8

Converta de $\frac{1}{\cos (x)}$ em $\sec (x)$ .

$- 2 \cot (x) \csc (x) \sec (x) \tan (x) + \cot^{2} (x) \csc (x) \sec (x) + \csc^{3} (x) \sec (x) + \sec^{3} (x) \csc (x) + \sec (x) \tan (x) \sec (x)$

Etapa 2.4.6.9

Multiplique $\sec (x) \tan (x) \sec (x)$ .

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Etapa 2.4.6.9.1

Eleve $\sec (x)$ à potência de $1$ .

$- 2 \cot (x) \csc (x) \sec (x) \tan (x) + \cot^{2} (x) \csc (x) \sec (x) + \csc^{3} (x) \sec (x) + \sec^{3} (x) \csc (x) + \sec^{1} (x) \sec (x) \tan (x)$

Etapa 2.4.6.9.2

Eleve $\sec (x)$ à potência de $1$ .

$- 2 \cot (x) \csc (x) \sec (x) \tan (x) + \cot^{2} (x) \csc (x) \sec (x) + \csc^{3} (x) \sec (x) + \sec^{3} (x) \csc (x) + \sec^{1} (x) \sec^{1} (x) \tan (x)$

Etapa 2.4.6.9.3

Use a regra da multiplicação de potências $a^{m} a^{n} = a^{m + n}$ para combinar expoentes.

$- 2 \cot (x) \csc (x) \sec (x) \tan (x) + \cot^{2} (x) \csc (x) \sec (x) + \csc^{3} (x) \sec (x) + \sec^{3} (x) \csc (x) + {\sec (x)}^{1 + 1} \tan (x)$

Etapa 2.4.6.9.4

Some $1$ e $1$ .

$f'' (x) = - 2 \cot (x) \csc (x) \sec (x) \tan (x) + \cot^{2} (x) \csc (x) \sec (x) + \csc^{3} (x) \sec (x) + \sec^{3} (x) \csc (x) + \sec^{2} (x) \tan (x)$