Cálculo Ejemplos

$\cos (x) \frac{d y}{d x} + y = \sin (x)$

Paso 1

Reescribe la ecuación diferencial como $\frac{d y}{d x} + M (x) y = Q (x)$ .

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Paso 1.1

Divide cada término en $\cos (x) \frac{d y}{d x} + y = \sin (x)$ por $\cos (x)$ .

$\frac{\cos (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos (x)} = \frac{\sin (x)}{\cos (x)}$

Paso 1.2

Cancela el factor común de $\cos (x)$ .

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Paso 1.2.1

Cancela el factor común.

$\frac{\cos (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos (x)} = \frac{\sin (x)}{\cos (x)}$

Paso 1.2.2

Divide $\frac{d y}{d x}$ por $1$ .

$\frac{d y}{d x} + \frac{y}{\cos (x)} = \frac{\sin (x)}{\cos (x)}$

Paso 1.3

Factoriza $y$ de $\frac{y}{\cos (x)}$ .

$\frac{d y}{d x} + y \frac{1}{\cos (x)} = \frac{\sin (x)}{\cos (x)}$

Paso 1.4

Reordena $y$ y $\frac{1}{\cos (x)}$ .

$\frac{d y}{d x} + \frac{1}{\cos (x)} y = \frac{\sin (x)}{\cos (x)}$

Paso 2

El factor integrador se define mediante la fórmula $e^{\int P (x) d x}$ , donde $P (x) = \frac{1}{\cos (x)}$ .

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Paso 2.1

Establece la integración.

$e^{\int \frac{1}{\cos (x)} d x}$

Paso 2.2

Integra $\frac{1}{\cos (x)}$ .

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Paso 2.2.1

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

$e^{\int \sec (x) d x}$

Paso 2.2.2

La integral de $\sec (x)$ con respecto a $x$ es $\ln (| \sec (x) + \tan (x) |)$ .

$e^{\ln (| \sec (x) + \tan (x) |) + C}$

Paso 2.3

Elimina la constante de integración.

$e^{\ln (\sec (x) + \tan (x))}$

Paso 2.4

Potencia y logaritmo son funciones inversas.

$\sec (x) + \tan (x)$

Paso 3

Multiplica cada término por el factor integrador $\sec (x) + \tan (x)$ .

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Paso 3.1

Multiplica cada término por $\sec (x) + \tan (x)$ .

$(\sec (x) + \tan (x)) \frac{d y}{d x} + (\sec (x) + \tan (x)) (\frac{1}{\cos (x)} y) = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2

Simplifica cada término.

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Paso 3.2.1

Simplifica cada término.

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Paso 3.2.1.1

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

$(\frac{1}{\cos (x)} + \tan (x)) \frac{d y}{d x} + (\sec (x) + \tan (x)) (\frac{1}{\cos (x)} y) = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.1.2

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

$(\frac{1}{\cos (x)} + \frac{\sin (x)}{\cos (x)}) \frac{d y}{d x} + (\sec (x) + \tan (x)) (\frac{1}{\cos (x)} y) = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.2

Aplica la propiedad distributiva.

$\frac{1}{\cos (x)} \frac{d y}{d x} + \frac{\sin (x)}{\cos (x)} \frac{d y}{d x} + (\sec (x) + \tan (x)) (\frac{1}{\cos (x)} y) = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.3

Combina $\frac{1}{\cos (x)}$ y $\frac{d y}{d x}$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x)}{\cos (x)} \frac{d y}{d x} + (\sec (x) + \tan (x)) (\frac{1}{\cos (x)} y) = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.4

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

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + (\sec (x) + \tan (x)) (\frac{1}{\cos (x)} y) = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.5

Simplifica cada término.

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Paso 3.2.5.1

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

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + (\frac{1}{\cos (x)} + \tan (x)) (\frac{1}{\cos (x)} y) = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.5.2

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

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + (\frac{1}{\cos (x)} + \frac{\sin (x)}{\cos (x)}) (\frac{1}{\cos (x)} y) = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.6

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

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + (\frac{1}{\cos (x)} + \frac{\sin (x)}{\cos (x)}) \frac{y}{\cos (x)} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.7

Aplica la propiedad distributiva.

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{1}{\cos (x)} \cdot \frac{y}{\cos (x)} + \frac{\sin (x)}{\cos (x)} \cdot \frac{y}{\cos (x)} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.8

Multiplica $\frac{1}{\cos (x)} \cdot \frac{y}{\cos (x)}$ .

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Paso 3.2.8.1

Multiplica $\frac{1}{\cos (x)}$ por $\frac{y}{\cos (x)}$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos (x) \cos (x)} + \frac{\sin (x)}{\cos (x)} \cdot \frac{y}{\cos (x)} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.8.2

Eleva $\cos (x)$ a la potencia de $1$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{1} (x) \cos (x)} + \frac{\sin (x)}{\cos (x)} \cdot \frac{y}{\cos (x)} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.8.3

Eleva $\cos (x)$ a la potencia de $1$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{1} (x) \cos^{1} (x)} + \frac{\sin (x)}{\cos (x)} \cdot \frac{y}{\cos (x)} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.8.4

Usa la regla de la potencia $a^{m} a^{n} = a^{m + n}$ para combinar exponentes.

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{{\cos (x)}^{1 + 1}} + \frac{\sin (x)}{\cos (x)} \cdot \frac{y}{\cos (x)} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.8.5

Suma $1$ y $1$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x)}{\cos (x)} \cdot \frac{y}{\cos (x)} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.9

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

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Paso 3.2.9.1

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

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos (x) \cos (x)} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.9.2

Eleva $\cos (x)$ a la potencia de $1$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{1} (x) \cos (x)} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.9.3

Eleva $\cos (x)$ a la potencia de $1$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{1} (x) \cos^{1} (x)} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.9.4

Usa la regla de la potencia $a^{m} a^{n} = a^{m + n}$ para combinar exponentes.

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{{\cos (x)}^{1 + 1}} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.2.9.5

Suma $1$ y $1$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = (\sec (x) + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.3

Simplifica cada término.

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Paso 3.3.1

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

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = (\frac{1}{\cos (x)} + \tan (x)) \frac{\sin (x)}{\cos (x)}$

Paso 3.3.2

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

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = (\frac{1}{\cos (x)} + \frac{\sin (x)}{\cos (x)}) \frac{\sin (x)}{\cos (x)}$

Paso 3.4

Aplica la propiedad distributiva.

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{1}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)} + \frac{\sin (x)}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)}$

Paso 3.5

Multiplica $\frac{1}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)}$ .

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Paso 3.5.1

Multiplica $\frac{1}{\cos (x)}$ por $\frac{\sin (x)}{\cos (x)}$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos (x) \cos (x)} + \frac{\sin (x)}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)}$

Paso 3.5.2

Eleva $\cos (x)$ a la potencia de $1$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{1} (x) \cos (x)} + \frac{\sin (x)}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)}$

Paso 3.5.3

Eleva $\cos (x)$ a la potencia de $1$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{1} (x) \cos^{1} (x)} + \frac{\sin (x)}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)}$

Paso 3.5.4

Usa la regla de la potencia $a^{m} a^{n} = a^{m + n}$ para combinar exponentes.

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{{\cos (x)}^{1 + 1}} + \frac{\sin (x)}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)}$

Paso 3.5.5

Suma $1$ y $1$ .

$\frac{\frac{d y}{d x}}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin (x)}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)}$

Paso 3.6

Multiplica $\frac{\sin (x)}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)}$ .

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Paso 3.6.1

Multiplica $\frac{\sin (x)}{\cos (x)}$ por $\frac{\sin (x)}{\cos (x)}$ .

Paso 3.6.2

Eleva $\sin (x)$ a la potencia de $1$ .

Paso 3.6.3

Eleva $\sin (x)$ a la potencia de $1$ .

Paso 3.6.4

Usa la regla de la potencia $a^{m} a^{n} = a^{m + n}$ para combinar exponentes.

Paso 3.6.5

Suma $1$ y $1$ .

Paso 3.6.6

Eleva $\cos (x)$ a la potencia de $1$ .

Paso 3.6.7

Eleva $\cos (x)$ a la potencia de $1$ .

Paso 3.6.8

Usa la regla de la potencia $a^{m} a^{n} = a^{m + n}$ para combinar exponentes.

Paso 3.6.9

Suma $1$ y $1$ .

Paso 3.7

Simplifica cada término.

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Paso 3.7.1

Separa las fracciones.

$\frac{\frac{d y}{d x}}{1} \cdot \frac{1}{\cos (x)} + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.2

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

$\frac{\frac{d y}{d x}}{1} \sec (x) + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.3

Divide $\frac{d y}{d x}$ por $1$ .

$\frac{d y}{d x} \sec (x) + \frac{\sin (x) \frac{d y}{d x}}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.4

Separa las fracciones.

$\frac{d y}{d x} \sec (x) + \frac{\frac{d y}{d x}}{1} \cdot \frac{\sin (x)}{\cos (x)} + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.5

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

$\frac{d y}{d x} \sec (x) + \frac{\frac{d y}{d x}}{1} \tan (x) + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.6

Divide $\frac{d y}{d x}$ por $1$ .

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + \frac{y}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.7

Multiplica por $1$ .

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + \frac{y}{\cos^{2} (x) \cdot 1} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.8

Separa las fracciones.

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + \frac{y}{1} \cdot \frac{1}{\cos^{2} (x)} + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.9

Convierte de $\frac{1}{\cos^{2} (x)}$ a $\sec^{2} (x)$ .

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + \frac{y}{1} \sec^{2} (x) + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.10

Divide $y$ por $1$ .

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + \frac{\sin (x) y}{\cos^{2} (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.11

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

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + \frac{\sin (x) y}{\cos (x) \cos (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.12

Separa las fracciones.

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + \frac{y}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)} = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.13

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

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + \frac{y}{\cos (x)} \tan (x) = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.14

Separa las fracciones.

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + \frac{y}{1} \cdot \frac{1}{\cos (x)} \tan (x) = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.15

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

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + \frac{y}{1} \sec (x) \tan (x) = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.7.16

Divide $y$ por $1$ .

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + y \sec (x) \tan (x) = \frac{\sin (x)}{\cos^{2} (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.8

Simplifica cada término.

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Paso 3.8.1

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

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + y \sec (x) \tan (x) = \frac{\sin (x)}{\cos (x) \cos (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.8.2

Separa las fracciones.

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + y \sec (x) \tan (x) = \frac{1}{\cos (x)} \cdot \frac{\sin (x)}{\cos (x)} + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.8.3

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

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + y \sec (x) \tan (x) = \frac{1}{\cos (x)} \tan (x) + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.8.4

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

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + y \sec (x) \tan (x) = \sec (x) \tan (x) + \frac{\sin^{2} (x)}{\cos^{2} (x)}$

Paso 3.8.5

Convierte de $\frac{\sin^{2} (x)}{\cos^{2} (x)}$ a $\tan^{2} (x)$ .

$\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + y \sec (x) \tan (x) = \sec (x) \tan (x) + \tan^{2} (x)$

Paso 3.9

Reordena los factores en $\frac{d y}{d x} \sec (x) + \frac{d y}{d x} \tan (x) + y \sec^{2} (x) + y \sec (x) \tan (x) = \sec (x) \tan (x) + \tan^{2} (x)$ .

$\sec (x) \frac{d y}{d x} + \tan (x) \frac{d y}{d x} + y \sec^{2} (x) + y \sec (x) \tan (x) = \sec (x) \tan (x) + \tan^{2} (x)$

Paso 4

Reescribe el lado izquierdo como resultado de la diferenciación de un producto.

$\frac{d}{d x} [(\sec (x) + \tan (x)) y] = \sec (x) \tan (x) + \tan^{2} (x)$

Paso 5

Establece una integral en cada lado.

$\int \frac{d}{d x} [(\sec (x) + \tan (x)) y] d x = \int \sec (x) \tan (x) + \tan^{2} (x) d x$

Paso 6

Integra el lado izquierdo.

$(\sec (x) + \tan (x)) y = \int \sec (x) \tan (x) + \tan^{2} (x) d x$

Paso 7

Integra el lado derecho.

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Paso 7.1

Divide la única integral en varias integrales.

$(\sec (x) + \tan (x)) y = \int \sec (x) \tan (x) d x + \int \tan^{2} (x) d x$

Paso 7.2

Como la derivada de $\sec (x)$ es $\sec (x) \tan (x)$ , la integral de $\sec (x) \tan (x)$ es $\sec (x)$ .

$(\sec (x) + \tan (x)) y = \sec (x) + C + \int \tan^{2} (x) d x$

Paso 7.3

Mediante la identidad pitagórica, reescribe $\tan^{2} (x)$ como $- 1 + \sec^{2} (x)$ .

$(\sec (x) + \tan (x)) y = \sec (x) + C + \int - 1 + \sec^{2} (x) d x$

Paso 7.4

Divide la única integral en varias integrales.

$(\sec (x) + \tan (x)) y = \sec (x) + C + \int - 1 d x + \int \sec^{2} (x) d x$

Paso 7.5

Aplica la regla de la constante.

$(\sec (x) + \tan (x)) y = \sec (x) + C - x + C + \int \sec^{2} (x) d x$

Paso 7.6

Como la derivada de $\tan (x)$ es $\sec^{2} (x)$ , la integral de $\sec^{2} (x)$ es $\tan (x)$ .

$(\sec (x) + \tan (x)) y = \sec (x) + C - x + C + \tan (x) + C$

Paso 7.7

Simplifica.

$(\sec (x) + \tan (x)) y = \sec (x) - x + \tan (x) + C$

Paso 8

Divide cada término en $(\sec (x) + \tan (x)) y = \sec (x) - x + \tan (x) + C$ por $\sec (x) + \tan (x)$ y simplifica.

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Paso 8.1

Divide cada término en $(\sec (x) + \tan (x)) y = \sec (x) - x + \tan (x) + C$ por $\sec (x) + \tan (x)$ .

$\frac{(\sec (x) + \tan (x)) y}{\sec (x) + \tan (x)} = \frac{\sec (x)}{\sec (x) + \tan (x)} + \frac{- x}{\sec (x) + \tan (x)} + \frac{\tan (x)}{\sec (x) + \tan (x)} + \frac{C}{\sec (x) + \tan (x)}$

Paso 8.2

Simplifica el lado izquierdo.

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Paso 8.2.1

Cancela el factor común de $\sec (x) + \tan (x)$ .

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Paso 8.2.1.1

Cancela el factor común.

$\frac{(\sec (x) + \tan (x)) y}{\sec (x) + \tan (x)} = \frac{\sec (x)}{\sec (x) + \tan (x)} + \frac{- x}{\sec (x) + \tan (x)} + \frac{\tan (x)}{\sec (x) + \tan (x)} + \frac{C}{\sec (x) + \tan (x)}$

Paso 8.2.1.2

Divide $y$ por $1$ .

$y = \frac{\sec (x)}{\sec (x) + \tan (x)} + \frac{- x}{\sec (x) + \tan (x)} + \frac{\tan (x)}{\sec (x) + \tan (x)} + \frac{C}{\sec (x) + \tan (x)}$

Paso 8.3

Simplifica el lado derecho.

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Paso 8.3.1

Mueve el negativo al frente de la fracción.

$y = \frac{\sec (x)}{\sec (x) + \tan (x)} - \frac{x}{\sec (x) + \tan (x)} + \frac{\tan (x)}{\sec (x) + \tan (x)} + \frac{C}{\sec (x) + \tan (x)}$

Paso 8.3.2

Combina los numeradores sobre el denominador común.

$y = \frac{\sec (x) - x}{\sec (x) + \tan (x)} + \frac{\tan (x)}{\sec (x) + \tan (x)} + \frac{C}{\sec (x) + \tan (x)}$

Paso 8.3.3

Combina los numeradores sobre el denominador común.

$y = \frac{\sec (x) - x + \tan (x)}{\sec (x) + \tan (x)} + \frac{C}{\sec (x) + \tan (x)}$

Paso 8.3.4

Combina los numeradores sobre el denominador común.

$y = \frac{\sec (x) - x + \tan (x) + C}{\sec (x) + \tan (x)}$