Cálculo Exemplos

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

Step 1

Encontre a primeira derivada.

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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 $g (x) = \sec (x)$ .

$f' (x) = \csc (x) \frac{d}{d x} (\sec (x)) + \sec (x) \frac{d}{d x} (\csc (x))$

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

$f' (x) = \csc (x) (\sec (x) \tan (x)) + \sec (x) \frac{d}{d x} (\csc (x))$

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

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

Reordene os termos.

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

Step 2

Encontre a segunda derivada.

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

$f'' (x) = \frac{d}{d x} (\csc (x) \sec (x) \tan (x)) + \frac{d}{d x} (- \cot (x) \csc (x) \sec (x))$

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

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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 $g (x) = \tan (x)$ .

$f'' (x) = \csc (x) \sec (x) \frac{d}{d x} (\tan (x)) + \tan (x) \frac{d}{d x} (\csc (x) \sec (x)) + \frac{d}{d x} (- \cot (x) \csc (x) \sec (x))$

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

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

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 $g (x) = \sec (x)$ .

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

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

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

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

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

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

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

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

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

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Eleve $\sec (x)$ à potência de $1$ .

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

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

$f'' (x) = \csc (x) {\sec (x)}^{2 + 1} + \tan (x) (\csc (x) (\sec (x) \tan (x)) + \sec (x) (- \csc (x) \cot (x))) + \frac{d}{d x} (- \cot (x) \csc (x) \sec (x))$

Some $2$ e $1$ .

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

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

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

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

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

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 $g (x) = \sec (x)$ .

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

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

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

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 $g (x) = \csc (x)$ .

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

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

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

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

Eleve $\cot (x)$ à potência de $1$ .

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

Eleve $\cot (x)$ à potência de $1$ .

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

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

Some $1$ e $1$ .

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

Eleve $\csc (x)$ à potência de $1$ .

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

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

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

Some $1$ e $2$ .

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

Simplifique.

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Aplique a propriedade distributiva.

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

Aplique a propriedade distributiva.

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

Aplique a propriedade distributiva.

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

Combine os termos.

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Eleve $\tan (x)$ à potência de $1$ .

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

Eleve $\tan (x)$ à potência de $1$ .

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

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

Some $1$ e $1$ .

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

Multiplique $- 1$ por $- 1$ .

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

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

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

Multiplique $- 1$ por $- 1$ .

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

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

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

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

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

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

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

Reordene os termos.

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

Simplifique cada termo.

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

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

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

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

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

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

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

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

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

Cancele o fator comum.

Reescreva a expressão.

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

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

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

Separe as frações.

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

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

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

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

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

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

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Eleve $\sec (x)$ à potência de $1$ .

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

Eleve $\sec (x)$ à potência de $1$ .

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

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

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

Some $1$ e $1$ .

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