Cálculo Ejemplos

${\cos (x)}^{\frac{1}{x^{2}}}$

Paso 1

Usa las propiedades de los logaritmos para simplificar la diferenciación.

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Paso 1.1

Reescribe ${\cos (x)}^{\frac{1}{x^{2}}}$ como $e^{\ln ({\cos (x)}^{\frac{1}{x^{2}}})}$ .

$\frac{d}{d x} [e^{\ln ({\cos (x)}^{\frac{1}{x^{2}}})}]$

Paso 1.2

Expande $\ln ({\cos (x)}^{\frac{1}{x^{2}}})$ ; para ello, mueve $\frac{1}{x^{2}}$ fuera del logaritmo.

$\frac{d}{d x} [e^{\frac{1}{x^{2}} \ln (\cos (x))}]$

Paso 2

Combina $\frac{1}{x^{2}}$ y $\ln (\cos (x))$ .

$\frac{d}{d x} [e^{\frac{\ln (\cos (x))}{x^{2}}}]$

Paso 3

Diferencia con la regla de la cadena, que establece que $\frac{d}{d x} [f (g (x))]$ es $f' (g (x)) g' (x)$ donde $f (x) = e^{x}$ y $g (x) = \frac{\ln (\cos (x))}{x^{2}}$ .

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Paso 3.1

Para aplicar la regla de la cadena, establece $u_{1}$ como $\frac{\ln (\cos (x))}{x^{2}}$ .

$\frac{d}{d u_{1}} [e^{u_{1}}] \frac{d}{d x} [\frac{\ln (\cos (x))}{x^{2}}]$

Paso 3.2

Diferencia con la regla exponencial, que establece que $\frac{d}{d u_{1}} [a^{u_{1}}]$ es $a^{u_{1}} \ln (a)$ donde $a$ = $e$ .

$e^{u_{1}} \frac{d}{d x} [\frac{\ln (\cos (x))}{x^{2}}]$

Paso 3.3

Reemplaza todos los casos de $u_{1}$ con $\frac{\ln (\cos (x))}{x^{2}}$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{d}{d x} [\frac{\ln (\cos (x))}{x^{2}}]$

Paso 4

Diferencia con la regla del cociente, que establece que $\frac{d}{d x} [\frac{f (x)}{g (x)}]$ es $\frac{g (x) \frac{d}{d x} [f (x)] - f (x) \frac{d}{d x} [g (x)]}{{g (x)}^{2}}$ donde $f (x) = \ln (\cos (x))$ y $g (x) = x^{2}$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x^{2} \frac{d}{d x} [\ln (\cos (x))] - \ln (\cos (x)) \frac{d}{d x} [x^{2}]}{{(x^{2})}^{2}}$

Paso 5

Multiplica los exponentes en ${(x^{2})}^{2}$ .

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Paso 5.1

Aplica la regla de la potencia y multiplica los exponentes, ${(a^{m})}^{n} = a^{m n}$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x^{2} \frac{d}{d x} [\ln (\cos (x))] - \ln (\cos (x)) \frac{d}{d x} [x^{2}]}{x^{2 \cdot 2}}$

Paso 5.2

Multiplica $2$ por $2$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x^{2} \frac{d}{d x} [\ln (\cos (x))] - \ln (\cos (x)) \frac{d}{d x} [x^{2}]}{x^{4}}$

Paso 6

Diferencia con la regla de la cadena, que establece que $\frac{d}{d x} [f (g (x))]$ es $f' (g (x)) g' (x)$ donde $f (x) = \ln (x)$ y $g (x) = \cos (x)$ .

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Paso 6.1

Para aplicar la regla de la cadena, establece $u_{2}$ como $\cos (x)$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x^{2} (\frac{d}{d u_{2}} [\ln (u_{2})] \frac{d}{d x} [\cos (x)]) - \ln (\cos (x)) \frac{d}{d x} [x^{2}]}{x^{4}}$

Paso 6.2

La derivada de $\ln (u_{2})$ con respecto a $u_{2}$ es $\frac{1}{u_{2}}$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x^{2} (\frac{1}{u_{2}} \frac{d}{d x} [\cos (x)]) - \ln (\cos (x)) \frac{d}{d x} [x^{2}]}{x^{4}}$

Paso 6.3

Reemplaza todos los casos de $u_{2}$ con $\cos (x)$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x^{2} (\frac{1}{\cos (x)} \frac{d}{d x} [\cos (x)]) - \ln (\cos (x)) \frac{d}{d x} [x^{2}]}{x^{4}}$

Paso 7

Convierte de $\frac{1}{\cos (x)}$ a $\sec (x)$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x^{2} (\sec (x) \frac{d}{d x} [\cos (x)]) - \ln (\cos (x)) \frac{d}{d x} [x^{2}]}{x^{4}}$

Paso 8

La derivada de $\cos (x)$ con respecto a $x$ es $- \sin (x)$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x^{2} (\sec (x) (- \sin (x))) - \ln (\cos (x)) \frac{d}{d x} [x^{2}]}{x^{4}}$

Paso 9

Diferencia con la regla de la potencia.

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Paso 9.1

Diferencia con la regla de la potencia, que establece que $\frac{d}{d x} [x^{n}]$ es $n x^{n - 1}$ donde $n = 2$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x^{2} (\sec (x) (- \sin (x))) - \ln (\cos (x)) (2 x)}{x^{4}}$

Paso 9.2

Simplifica con la obtención del factor común.

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Paso 9.2.1

Multiplica $2$ por $- 1$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x^{2} (\sec (x) (- \sin (x))) - 2 \ln (\cos (x)) x}{x^{4}}$

Paso 9.2.2

Factoriza $x$ de $x^{2} (\sec (x) (- \sin (x))) - 2 \ln (\cos (x)) x$ .

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Paso 9.2.2.1

Factoriza $x$ de $x^{2} (\sec (x) (- \sin (x)))$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x (x (\sec (x) (- \sin (x)))) - 2 \ln (\cos (x)) x}{x^{4}}$

Paso 9.2.2.2

Factoriza $x$ de $- 2 \ln (\cos (x)) x$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x (x (\sec (x) (- \sin (x)))) + x (- 2 \ln (\cos (x)))}{x^{4}}$

Paso 9.2.2.3

Factoriza $x$ de $x (x (\sec (x) (- \sin (x)))) + x (- 2 \ln (\cos (x)))$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x (x (\sec (x) (- \sin (x))) - 2 \ln (\cos (x)))}{x^{4}}$

Paso 10

Cancela los factores comunes.

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Paso 10.1

Factoriza $x$ de $x^{4}$ .

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x (x (\sec (x) (- \sin (x))) - 2 \ln (\cos (x)))}{x \cdot x^{3}}$

Paso 10.2

Cancela el factor común.

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x (x (\sec (x) (- \sin (x))) - 2 \ln (\cos (x)))}{x \cdot x^{3}}$

Paso 10.3

Reescribe la expresión.

$e^{\frac{\ln (\cos (x))}{x^{2}}} \frac{x (\sec (x) (- \sin (x))) - 2 \ln (\cos (x))}{x^{3}}$

Paso 11

Combina $e^{\frac{\ln (\cos (x))}{x^{2}}}$ y $\frac{x (\sec (x) (- \sin (x))) - 2 \ln (\cos (x))}{x^{3}}$ .

$\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (x (\sec (x) (- \sin (x))) - 2 \ln (\cos (x)))}{x^{3}}$

Paso 12

Simplifica.

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Paso 12.1

Aplica la propiedad distributiva.

$\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (x (\sec (x) (- \sin (x)))) + e^{\frac{\ln (\cos (x))}{x^{2}}} (- 2 \ln (\cos (x)))}{x^{3}}$

Paso 12.2

Simplifica el numerador.

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Paso 12.2.1

Simplifica cada término.

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Paso 12.2.1.1

Reescribe con la propiedad conmutativa de la multiplicación.

$\frac{- e^{\frac{\ln (\cos (x))}{x^{2}}} x \sec (x) \sin (x) + e^{\frac{\ln (\cos (x))}{x^{2}}} (- 2 \ln (\cos (x)))}{x^{3}}$

Paso 12.2.1.2

Reescribe $\sec (x)$ en términos de senos y cosenos.

$\frac{- e^{\frac{\ln (\cos (x))}{x^{2}}} x \frac{1}{\cos (x)} \sin (x) + e^{\frac{\ln (\cos (x))}{x^{2}}} (- 2 \ln (\cos (x)))}{x^{3}}$

Paso 12.2.1.3

Multiplica $- e^{\frac{\ln (\cos (x))}{x^{2}}} x \frac{1}{\cos (x)}$ .

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Paso 12.2.1.3.1

Combina $e^{\frac{\ln (\cos (x))}{x^{2}}}$ y $\frac{1}{\cos (x)}$ .

$\frac{- x \frac{e^{\frac{\ln (\cos (x))}{x^{2}}}}{\cos (x)} \sin (x) + e^{\frac{\ln (\cos (x))}{x^{2}}} (- 2 \ln (\cos (x)))}{x^{3}}$

Paso 12.2.1.3.2

Combina $\frac{e^{\frac{\ln (\cos (x))}{x^{2}}}}{\cos (x)}$ y $x$ .

$\frac{- \frac{e^{\frac{\ln (\cos (x))}{x^{2}}} x}{\cos (x)} \sin (x) + e^{\frac{\ln (\cos (x))}{x^{2}}} (- 2 \ln (\cos (x)))}{x^{3}}$

Paso 12.2.1.4

Combina $\sin (x)$ y $\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} x}{\cos (x)}$ .

$\frac{- \frac{\sin (x) (e^{\frac{\ln (\cos (x))}{x^{2}}} x)}{\cos (x)} + e^{\frac{\ln (\cos (x))}{x^{2}}} (- 2 \ln (\cos (x)))}{x^{3}}$

Paso 12.2.1.5

Reescribe con la propiedad conmutativa de la multiplicación.

$\frac{- \frac{\sin (x) e^{\frac{\ln (\cos (x))}{x^{2}}} x}{\cos (x)} - 2 e^{\frac{\ln (\cos (x))}{x^{2}}} \ln (\cos (x))}{x^{3}}$

Paso 12.2.1.6

Multiplica $- 2 e^{\frac{\ln (\cos (x))}{x^{2}}} \ln (\cos (x))$ .

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Paso 12.2.1.6.1

Reordena $\ln (\cos (x))$ y $- 2$ .

$\frac{- \frac{\sin (x) e^{\frac{\ln (\cos (x))}{x^{2}}} x}{\cos (x)} - 2 \cdot \ln (\cos (x)) e^{\frac{\ln (\cos (x))}{x^{2}}}}{x^{3}}$

Paso 12.2.1.6.2

Simplifica $- 2 \cdot \ln (\cos (x))$ al mover $2$ dentro del algoritmo.

$\frac{- \frac{\sin (x) e^{\frac{\ln (\cos (x))}{x^{2}}} x}{\cos (x)} - \ln (\cos^{2} (x)) e^{\frac{\ln (\cos (x))}{x^{2}}}}{x^{3}}$

Paso 12.2.2

Simplifica cada término.

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Paso 12.2.2.1

Separa las fracciones.

$\frac{- (\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} x}{1} \cdot \frac{\sin (x)}{\cos (x)}) - \ln (\cos^{2} (x)) e^{\frac{\ln (\cos (x))}{x^{2}}}}{x^{3}}$

Paso 12.2.2.2

Convierte de $\frac{\sin (x)}{\cos (x)}$ a $\tan (x)$ .

$\frac{- (\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} x}{1} \tan (x)) - \ln (\cos^{2} (x)) e^{\frac{\ln (\cos (x))}{x^{2}}}}{x^{3}}$

Paso 12.2.2.3

Divide $e^{\frac{\ln (\cos (x))}{x^{2}}} x$ por $1$ .

$\frac{- e^{\frac{\ln (\cos (x))}{x^{2}}} x \tan (x) - \ln (\cos^{2} (x)) e^{\frac{\ln (\cos (x))}{x^{2}}}}{x^{3}}$

Paso 12.2.3

Reordena los factores en $- e^{\frac{\ln (\cos (x))}{x^{2}}} x \tan (x) - \ln (\cos^{2} (x)) e^{\frac{\ln (\cos (x))}{x^{2}}}$ .

$\frac{- x e^{\frac{\ln (\cos (x))}{x^{2}}} \tan (x) - e^{\frac{\ln (\cos (x))}{x^{2}}} \ln (\cos^{2} (x))}{x^{3}}$

Paso 12.3

Reordena los términos.

$\frac{- e^{\frac{\ln (\cos (x))}{x^{2}}} x \tan (x) - e^{\frac{\ln (\cos (x))}{x^{2}}} \ln (\cos^{2} (x))}{x^{3}}$

Paso 12.4

Simplifica el numerador.

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Paso 12.4.1

Factoriza $e^{\frac{\ln (\cos (x))}{x^{2}}}$ de $- e^{\frac{\ln (\cos (x))}{x^{2}}} x \tan (x) - e^{\frac{\ln (\cos (x))}{x^{2}}} \ln (\cos^{2} (x))$ .

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Paso 12.4.1.1

Mueve $e^{\frac{\ln (\cos (x))}{x^{2}}}$ .

$\frac{- x e^{\frac{\ln (\cos (x))}{x^{2}}} \tan (x) - e^{\frac{\ln (\cos (x))}{x^{2}}} \ln (\cos^{2} (x))}{x^{3}}$

Paso 12.4.1.2

Factoriza $e^{\frac{\ln (\cos (x))}{x^{2}}}$ de $- x e^{\frac{\ln (\cos (x))}{x^{2}}} \tan (x)$ .

$\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (- x \tan (x)) - e^{\frac{\ln (\cos (x))}{x^{2}}} \ln (\cos^{2} (x))}{x^{3}}$

Paso 12.4.1.3

Factoriza $e^{\frac{\ln (\cos (x))}{x^{2}}}$ de $- e^{\frac{\ln (\cos (x))}{x^{2}}} \ln (\cos^{2} (x))$ .

$\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (- x \tan (x)) + e^{\frac{\ln (\cos (x))}{x^{2}}} (- \ln (\cos^{2} (x)))}{x^{3}}$

Paso 12.4.1.4

Factoriza $e^{\frac{\ln (\cos (x))}{x^{2}}}$ de $e^{\frac{\ln (\cos (x))}{x^{2}}} (- x \tan (x)) + e^{\frac{\ln (\cos (x))}{x^{2}}} (- \ln (\cos^{2} (x)))$ .

$\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (- x \tan (x) - \ln (\cos^{2} (x)))}{x^{3}}$

Paso 12.4.2

Reescribe $\tan (x)$ en términos de senos y cosenos.

$\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (- x \frac{\sin (x)}{\cos (x)} - \ln (\cos^{2} (x)))}{x^{3}}$

Paso 12.4.3

Combina $\frac{\sin (x)}{\cos (x)}$ y $x$ .

$\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (- \frac{\sin (x) x}{\cos (x)} - \ln (\cos^{2} (x)))}{x^{3}}$

Paso 12.4.4

Factoriza $- 1$ de $- \frac{\sin (x) x}{\cos (x)} - \ln (\cos^{2} (x))$ .

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Paso 12.4.4.1

Reordena $\sin (x)$ y $x$ .

$\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (- \frac{x \sin (x)}{\cos (x)} - \ln (\cos^{2} (x)))}{x^{3}}$

Paso 12.4.4.2

Factoriza $- 1$ de $- \frac{x \sin (x)}{\cos (x)}$ .

$\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (- (\frac{x \sin (x)}{\cos (x)}) - \ln (\cos^{2} (x)))}{x^{3}}$

Paso 12.4.4.3

Factoriza $- 1$ de $- \ln (\cos^{2} (x))$ .

$\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (- (\frac{x \sin (x)}{\cos (x)}) - (\ln (\cos^{2} (x))))}{x^{3}}$

Paso 12.4.4.4

Factoriza $- 1$ de $- (\frac{x \sin (x)}{\cos (x)}) - (\ln (\cos^{2} (x)))$ .

$\frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (- (\frac{x \sin (x)}{\cos (x)} + \ln (\cos^{2} (x))))}{x^{3}}$

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

Paso 12.4.5

Factoriza el negativo.

$\frac{- e^{\frac{\ln (\cos (x))}{x^{2}}} (\frac{x \sin (x)}{\cos (x)} + \ln (\cos^{2} (x)))}{x^{3}}$

Paso 12.5

Mueve el negativo al frente de la fracción.

$- \frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (\frac{x \sin (x)}{\cos (x)} + \ln (\cos^{2} (x)))}{x^{3}}$

Paso 12.6

Simplifica cada término.

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Paso 12.6.1

Separa las fracciones.

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

Paso 12.6.2

Convierte de $\frac{\sin (x)}{\cos (x)}$ a $\tan (x)$ .

$- \frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (\frac{x}{1} \tan (x) + \ln (\cos^{2} (x)))}{x^{3}}$

Paso 12.6.3

Divide $x$ por $1$ .

$- \frac{e^{\frac{\ln (\cos (x))}{x^{2}}} (x \tan (x) + \ln (\cos^{2} (x)))}{x^{3}}$