Trigonometría Ejemplos

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

Step 1

Resta $\frac{1}{1 - \sec (x)}$ de ambos lados de la ecuación.

$\frac{\sin^{2} (x) + 2 \cos (x) - 1}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)} = 0$

Step 2

Simplifica $\frac{\sin^{2} (x) + 2 \cos (x) - 1}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)}$ .

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Factoriza $1$ de $\frac{\sin^{2} (x) + 2 \cos (x) - 1}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)}$ .

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Factoriza $1$ de $\frac{\sin^{2} (x) + 2 \cos (x) - 1}{\sin^{2} (x) + 3 \cos (x) - 3}$ .

$1 \frac{\sin^{2} (x) + 2 \cos (x) - 1}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)} = 0$

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

$1 \frac{\sin^{2} (x) + 2 \cos (x) - 1}{\sin^{2} (x) + 3 \cos (x) - 3} + 1 (- \frac{1}{1 - \sec (x)}) = 0$

Factoriza $1$ de $1 \frac{\sin^{2} (x) + 2 \cos (x) - 1}{\sin^{2} (x) + 3 \cos (x) - 3} + 1 (- \frac{1}{1 - \sec (x)})$ .

$1 (\frac{\sin^{2} (x) + 2 \cos (x) - 1}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)}) = 0$

Mueve $- 1$ .

$1 (\frac{\sin^{2} (x) - 1 + 2 \cos (x)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)}) = 0$

Reordena $\sin^{2} (x)$ y $- 1$ .

$1 (\frac{- 1 + \sin^{2} (x) + 2 \cos (x)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)}) = 0$

Reescribe $- 1$ como $- 1 (1)$ .

$1 (\frac{- 1 (1) + \sin^{2} (x) + 2 \cos (x)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)}) = 0$

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

$1 (\frac{- 1 (1) - 1 (- \sin^{2} (x)) + 2 \cos (x)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)}) = 0$

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

$1 (\frac{- 1 (1 - \sin^{2} (x)) + 2 \cos (x)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)}) = 0$

Reescribe $- 1 (1 - \sin^{2} (x))$ como $- (1 - \sin^{2} (x))$ .

$1 (\frac{- (1 - \sin^{2} (x)) + 2 \cos (x)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)}) = 0$

Aplica la identidad pitagórica.

$1 (\frac{- \cos^{2} (x) + 2 \cos (x)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)}) = 0$

Multiplica $\frac{- \cos^{2} (x) + 2 \cos (x)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)}$ por $1$ .

$\frac{- \cos^{2} (x) + 2 \cos (x)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)} = 0$

Simplifica cada término.

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

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

$\frac{\cos (x) (- \cos (x)) + 2 \cos (x)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)} = 0$

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

$\frac{\cos (x) (- \cos (x)) + \cos (x) \cdot 2}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)} = 0$

Factoriza $\cos (x)$ de $\cos (x) (- \cos (x)) + \cos (x) \cdot 2$ .

$\frac{\cos (x) (- \cos (x) + 2)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \sec (x)} = 0$

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

$\frac{\cos (x) (- \cos (x) + 2)}{\sin^{2} (x) + 3 \cos (x) - 3} - \frac{1}{1 - \frac{1}{\cos (x)}} = 0$

Para escribir $\frac{\cos (x) (- \cos (x) + 2)}{\sin^{2} (x) + 3 \cos (x) - 3}$ como una fracción con un denominador común, multiplica por $\frac{1 - \frac{1}{\cos (x)}}{1 - \frac{1}{\cos (x)}}$ .

$\frac{\cos (x) (- \cos (x) + 2)}{\sin^{2} (x) + 3 \cos (x) - 3} \cdot \frac{1 - \frac{1}{\cos (x)}}{1 - \frac{1}{\cos (x)}} - \frac{1}{1 - \frac{1}{\cos (x)}} = 0$

Para escribir $- \frac{1}{1 - \frac{1}{\cos (x)}}$ como una fracción con un denominador común, multiplica por $\frac{\sin^{2} (x) + 3 \cos (x) - 3}{\sin^{2} (x) + 3 \cos (x) - 3}$ .

$\frac{\cos (x) (- \cos (x) + 2)}{\sin^{2} (x) + 3 \cos (x) - 3} \cdot \frac{1 - \frac{1}{\cos (x)}}{1 - \frac{1}{\cos (x)}} - \frac{1}{1 - \frac{1}{\cos (x)}} \cdot \frac{\sin^{2} (x) + 3 \cos (x) - 3}{\sin^{2} (x) + 3 \cos (x) - 3} = 0$

Escribe cada expresión con un denominador común de $(\sin^{2} (x) + 3 \cos (x) - 3) (1 - \frac{1}{\cos (x)})$ , mediante la multiplicación de cada uno por un factor adecuado de $1$ .

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Multiplica $\frac{\cos (x) (- \cos (x) + 2)}{\sin^{2} (x) + 3 \cos (x) - 3}$ por $\frac{1 - \frac{1}{\cos (x)}}{1 - \frac{1}{\cos (x)}}$ .

$\frac{\cos (x) (- \cos (x) + 2) (1 - \frac{1}{\cos (x)})}{(\sin^{2} (x) + 3 \cos (x) - 3) (1 - \frac{1}{\cos (x)})} - \frac{1}{1 - \frac{1}{\cos (x)}} \cdot \frac{\sin^{2} (x) + 3 \cos (x) - 3}{\sin^{2} (x) + 3 \cos (x) - 3} = 0$

Multiplica $\frac{1}{1 - \frac{1}{\cos (x)}}$ por $\frac{\sin^{2} (x) + 3 \cos (x) - 3}{\sin^{2} (x) + 3 \cos (x) - 3}$ .

$\frac{\cos (x) (- \cos (x) + 2) (1 - \frac{1}{\cos (x)})}{(\sin^{2} (x) + 3 \cos (x) - 3) (1 - \frac{1}{\cos (x)})} - \frac{\sin^{2} (x) + 3 \cos (x) - 3}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Reordena los factores de $(\sin^{2} (x) + 3 \cos (x) - 3) (1 - \frac{1}{\cos (x)})$ .

$\frac{\cos (x) (- \cos (x) + 2) (1 - \frac{1}{\cos (x)})}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} - \frac{\sin^{2} (x) + 3 \cos (x) - 3}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Combina los numeradores sobre el denominador común.

$\frac{\cos (x) (- \cos (x) + 2) (1 - \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Simplifica el numerador.

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Aplica la propiedad distributiva.

$\frac{(\cos (x) (- \cos (x)) + \cos (x) \cdot 2) (1 - \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Reescribe con la propiedad conmutativa de la multiplicación.

$\frac{(- \cos (x) \cos (x) + \cos (x) \cdot 2) (1 - \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Mueve $2$ a la izquierda de $\cos (x)$ .

$\frac{(- \cos (x) \cos (x) + 2 \cdot \cos (x)) (1 - \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Multiplica $- \cos (x) \cos (x)$ .

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

$\frac{(- (\cos^{1} (x) \cos (x)) + 2 \cdot \cos (x)) (1 - \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

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

$\frac{(- (\cos^{1} (x) \cos^{1} (x)) + 2 \cdot \cos (x)) (1 - \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

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

$\frac{(- {\cos (x)}^{1 + 1} + 2 \cdot \cos (x)) (1 - \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Suma $1$ y $1$ .

$\frac{(- \cos^{2} (x) + 2 \cdot \cos (x)) (1 - \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

$\frac{(- \cos^{2} (x) + 2 \cos (x)) (1 - \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Expande $(- \cos^{2} (x) + 2 \cos (x)) (1 - \frac{1}{\cos (x)})$ con el método PEIU (primero, exterior, interior, ultimo).

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Aplica la propiedad distributiva.

$\frac{- \cos^{2} (x) (1 - \frac{1}{\cos (x)}) + 2 \cos (x) (1 - \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Aplica la propiedad distributiva.

$\frac{- \cos^{2} (x) \cdot 1 - \cos^{2} (x) (- \frac{1}{\cos (x)}) + 2 \cos (x) (1 - \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Aplica la propiedad distributiva.

$\frac{- \cos^{2} (x) \cdot 1 - \cos^{2} (x) (- \frac{1}{\cos (x)}) + 2 \cos (x) \cdot 1 + 2 \cos (x) (- \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Simplifica y combina los términos similares.

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Simplifica cada término.

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Multiplica $- 1$ por $1$ .

$\frac{- \cos^{2} (x) - \cos^{2} (x) (- \frac{1}{\cos (x)}) + 2 \cos (x) \cdot 1 + 2 \cos (x) (- \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

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

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Mueve el signo menos inicial en $- \frac{1}{\cos (x)}$ al numerador.

$\frac{- \cos^{2} (x) - \cos^{2} (x) \frac{- 1}{\cos (x)} + 2 \cos (x) \cdot 1 + 2 \cos (x) (- \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

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

$\frac{- \cos^{2} (x) + \cos (x) (- \cos (x)) \frac{- 1}{\cos (x)} + 2 \cos (x) \cdot 1 + 2 \cos (x) (- \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Cancela el factor común.

Reescribe la expresión.

$\frac{- \cos^{2} (x) - \cos (x) \cdot - 1 + 2 \cos (x) \cdot 1 + 2 \cos (x) (- \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Multiplica $- 1$ por $- 1$ .

$\frac{- \cos^{2} (x) + 1 \cos (x) + 2 \cos (x) \cdot 1 + 2 \cos (x) (- \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Multiplica $\cos (x)$ por $1$ .

$\frac{- \cos^{2} (x) + \cos (x) + 2 \cos (x) \cdot 1 + 2 \cos (x) (- \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Multiplica $2$ por $1$ .

$\frac{- \cos^{2} (x) + \cos (x) + 2 \cos (x) + 2 \cos (x) (- \frac{1}{\cos (x)}) - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

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

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Mueve el signo menos inicial en $- \frac{1}{\cos (x)}$ al numerador.

$\frac{- \cos^{2} (x) + \cos (x) + 2 \cos (x) + 2 \cos (x) \frac{- 1}{\cos (x)} - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

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

$\frac{- \cos^{2} (x) + \cos (x) + 2 \cos (x) + \cos (x) \cdot 2 \frac{- 1}{\cos (x)} - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Cancela el factor común.

$\frac{- \cos^{2} (x) + \cos (x) + 2 \cos (x) + \cos (x) \cdot 2 \frac{- 1}{\cos (x)} - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Reescribe la expresión.

$\frac{- \cos^{2} (x) + \cos (x) + 2 \cos (x) + 2 \cdot - 1 - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Multiplica $2$ por $- 1$ .

$\frac{- \cos^{2} (x) + \cos (x) + 2 \cos (x) - 2 - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Suma $\cos (x)$ y $2 \cos (x)$ .

$\frac{- \cos^{2} (x) + 3 \cos (x) - 2 - (\sin^{2} (x) + 3 \cos (x) - 3)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Aplica la propiedad distributiva.

$\frac{- \cos^{2} (x) + 3 \cos (x) - 2 - \sin^{2} (x) - (3 \cos (x)) - - 3}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Simplifica.

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Multiplica $3$ por $- 1$ .

$\frac{- \cos^{2} (x) + 3 \cos (x) - 2 - \sin^{2} (x) - 3 \cos (x) - - 3}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Multiplica $- 1$ por $- 3$ .

$\frac{- \cos^{2} (x) + 3 \cos (x) - 2 - \sin^{2} (x) - 3 \cos (x) + 3}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Resta $3 \cos (x)$ de $3 \cos (x)$ .

$\frac{- \cos^{2} (x) + 0 - 2 - \sin^{2} (x) + 3}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Suma $- \cos^{2} (x)$ y $0$ .

$\frac{- \cos^{2} (x) - 2 - \sin^{2} (x) + 3}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Suma $- 2$ y $3$ .

$\frac{- \cos^{2} (x) + 1 - \sin^{2} (x)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Reordena $- \cos^{2} (x)$ y $1$ .

$\frac{1 - \cos^{2} (x) - \sin^{2} (x)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Aplica la identidad pitagórica.

$\frac{\sin^{2} (x) - \sin^{2} (x)}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

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

$\frac{0}{(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)} = 0$

Divide $0$ por $(1 - \frac{1}{\cos (x)}) (\sin^{2} (x) + 3 \cos (x) - 3)$ .

$0 = 0$

Step 3

Como $0 = 0$ , la ecuación siempre será verdadera para cualquier valor de $x$ .

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Step 4

El resultado puede mostrarse de distintas formas.

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Notación de intervalo:

$(- \infty, \infty)$