Trigonometría Ejemplos

$\frac{1 - \sec (x)}{\tan (x)} - \frac{\tan (x)}{1 - \sec (x)} = 2 \cot (x)$

Step 1

Comienza por el lado izquierdo.

$\frac{1 - \sec (x)}{\tan (x)} - \frac{\tan (x)}{1 - \sec (x)}$

Step 2

Multiplica $\frac{\tan (x)}{1 - \sec (x)}$ por $\frac{1 + \sec (x)}{1 + \sec (x)}$ .

$\frac{1 - \sec (x)}{\tan (x)} - (\frac{\tan (x)}{1 - \sec (x)} \cdot \frac{1 + \sec (x)}{1 + \sec (x)})$

Step 3

Combinar.

$\frac{1 - \sec (x)}{\tan (x)} - \frac{\tan (x) (1 + \sec (x))}{(1 - \sec (x)) (1 + \sec (x))}$

Step 4

Simplifica el numerador.

Toca para ver más pasos...

Aplica la propiedad distributiva.

$\frac{1 - \sec (x)}{\tan (x)} - \frac{\tan (x) \cdot 1 + \tan (x) \sec (x)}{(1 - \sec (x)) (1 + \sec (x))}$

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

$\frac{1 - \sec (x)}{\tan (x)} - \frac{\tan (x) + \tan (x) \sec (x)}{(1 - \sec (x)) (1 + \sec (x))}$

Step 5

Simplifica el denominador.

Toca para ver más pasos...

Expande $(1 - \sec (x)) (1 + \sec (x))$ con el método PEIU (primero, exterior, interior, ultimo).

Toca para ver más pasos...

Aplica la propiedad distributiva.

$\frac{1 - \sec (x)}{\tan (x)} - \frac{\tan (x) + \tan (x) \sec (x)}{1 (1 + \sec (x)) - \sec (x) (1 + \sec (x))}$

Aplica la propiedad distributiva.

$\frac{1 - \sec (x)}{\tan (x)} - \frac{\tan (x) + \tan (x) \sec (x)}{1 \cdot 1 + 1 \sec (x) - \sec (x) (1 + \sec (x))}$

Aplica la propiedad distributiva.

$\frac{1 - \sec (x)}{\tan (x)} - \frac{\tan (x) + \tan (x) \sec (x)}{1 \cdot 1 + 1 \sec (x) - \sec (x) \cdot 1 - \sec (x) \sec (x)}$

Simplifica y combina los términos similares.

$\frac{1 - \sec (x)}{\tan (x)} - \frac{\tan (x) + \tan (x) \sec (x)}{1 - \sec^{2} (x)}$

Step 6

Escribe $- 1$ como una fracción con el denominador $1$ .

$\frac{1 - \sec (x)}{\tan (x)} + \frac{- 1}{1} \cdot \frac{\tan (x) + \tan (x) \sec (x)}{1 - \sec^{2} (x)}$

Step 7

Combinar.

$\frac{1 - \sec (x)}{\tan (x)} + \frac{- (\tan (x) + \tan (x) \sec (x))}{1 (1 - \sec^{2} (x))}$

Step 8

Aplica la propiedad distributiva.

$\frac{1 - \sec (x)}{\tan (x)} + \frac{- \tan (x) - \tan (x) \sec (x)}{1 (1 - \sec^{2} (x))}$

Step 9

Multiplica $1 - {\sec (x)}^{2}$ por $1$ .

$\frac{1 - \sec (x)}{\tan (x)} + \frac{- \tan (x) - \tan (x) \sec (x)}{1 - \sec^{2} (x)}$

Step 10

Aplica la identidad pitagórica.

Toca para ver más pasos...

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

$\frac{1 - \sec (x)}{\tan (x)} + \frac{- \tan (x) - \tan (x) \sec (x)}{- \sec^{2} (x) + 1}$

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

$\frac{1 - \sec (x)}{\tan (x)} + \frac{- \tan (x) - \tan (x) \sec (x)}{- (\sec^{2} (x)) + 1}$

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

$\frac{1 - \sec (x)}{\tan (x)} + \frac{- \tan (x) - \tan (x) \sec (x)}{- \sec^{2} (x) - 1 \cdot - 1}$

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

$\frac{1 - \sec (x)}{\tan (x)} + \frac{- \tan (x) - \tan (x) \sec (x)}{- (\sec^{2} (x) - 1)}$

Aplica la identidad pitagórica.

$\frac{1 - \sec (x)}{\tan (x)} + \frac{- \tan (x) - \tan (x) \sec (x)}{- \tan^{2} (x)}$

Step 11

Convierte a senos y cosenos.

Toca para ver más pasos...

Aplica la identidad recíproca a $\sec (x)$ .

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

Escribe $\tan (x)$ en senos y cosenos mediante la identidad del cociente.

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

Escribe $\tan (x)$ en senos y cosenos mediante la identidad del cociente.

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

Escribe $\tan (x)$ en senos y cosenos mediante la identidad del cociente.

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

Aplica la identidad recíproca a $\sec (x)$ .

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

Escribe $\tan (x)$ en senos y cosenos mediante la identidad del cociente.

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

Aplica la regla del producto a $\frac{\sin (x)}{\cos (x)}$ .

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

Step 12

Simplifica.

Toca para ver más pasos...

Reordena los factores de $- \frac{\sin (x)}{\cos (x)} \cdot \frac{1}{\cos (x)}$ .

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

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

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

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

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

Combina los numeradores sobre el denominador común.

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

Simplifica cada término.

Toca para ver más pasos...

Multiplica el numerador por la recíproca del denominador.

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

Aplica la propiedad distributiva.

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

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

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

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

Toca para ver más pasos...

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

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

Cancela el factor común.

Reescribe la expresión.

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

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

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

Multiplica el numerador por la recíproca del denominador.

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

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

Toca para ver más pasos...

Mueve el signo menos inicial en $- \frac{{\cos (x)}^{2}}{{\sin (x)}^{2}}$ al numerador.

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

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

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

Cancela el factor común.

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

Reescribe la expresión.

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

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

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

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

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

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

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

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

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

Suma $1$ y $1$ .

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

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

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

Cancela el factor común de $\cos (x)$ y ${\cos (x)}^{2}$ .

Toca para ver más pasos...

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

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

Cancela los factores comunes.

Toca para ver más pasos...

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

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

Cancela el factor común.

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

Reescribe la expresión.

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

Mueve el negativo al frente de la fracción.

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

Aplica la propiedad distributiva.

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

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

Toca para ver más pasos...

Mueve el signo menos inicial en $- \frac{\cos (x)}{{\sin (x)}^{2}}$ al numerador.

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

Factoriza $\sin (x)$ de $- \sin (x)$ .

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

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

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

Cancela el factor común.

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

Reescribe la expresión.

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

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

Toca para ver más pasos...

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

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

Mueve el signo menos inicial en $- \frac{\cos (x)}{{\sin (x)}^{2}}$ al numerador.

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

Factoriza $\sin (x)$ de $- \sin (x)$ .

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

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

$\frac{\cos (x)}{\sin (x)} - \frac{1}{\sin (x)} - 1 \frac{- \cos (x)}{\sin (x)} + \frac{\sin (x) \cdot - 1}{\cos (x)} \cdot \frac{- \cos (x)}{\sin (x) \sin (x)}$

Cancela el factor común.

$\frac{\cos (x)}{\sin (x)} - \frac{1}{\sin (x)} - 1 \frac{- \cos (x)}{\sin (x)} + \frac{\sin (x) \cdot - 1}{\cos (x)} \cdot \frac{- \cos (x)}{\sin (x) \sin (x)}$

Reescribe la expresión.

$\frac{\cos (x)}{\sin (x)} - \frac{1}{\sin (x)} - 1 \frac{- \cos (x)}{\sin (x)} + \frac{- 1}{\cos (x)} \cdot \frac{- \cos (x)}{\sin (x)}$

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

Toca para ver más pasos...

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

$\frac{\cos (x)}{\sin (x)} - \frac{1}{\sin (x)} - 1 \frac{- \cos (x)}{\sin (x)} + \frac{- 1}{\cos (x)} \cdot \frac{\cos (x) \cdot - 1}{\sin (x)}$

Cancela el factor común.

$\frac{\cos (x)}{\sin (x)} - \frac{1}{\sin (x)} - 1 \frac{- \cos (x)}{\sin (x)} + \frac{- 1}{\cos (x)} \cdot \frac{\cos (x) \cdot - 1}{\sin (x)}$

Reescribe la expresión.

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

Simplifica cada término.

Toca para ver más pasos...

Mueve el negativo al frente de la fracción.

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

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

Toca para ver más pasos...

Multiplica $- 1$ por $- 1$ .

$\frac{\cos (x)}{\sin (x)} - \frac{1}{\sin (x)} + 1 \frac{\cos (x)}{\sin (x)} - 1 \frac{- 1}{\sin (x)}$

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

$\frac{\cos (x)}{\sin (x)} - \frac{1}{\sin (x)} + \frac{\cos (x)}{\sin (x)} - 1 \frac{- 1}{\sin (x)}$

Mueve el negativo al frente de la fracción.

$\frac{\cos (x)}{\sin (x)} - \frac{1}{\sin (x)} + \frac{\cos (x)}{\sin (x)} - 1 (- \frac{1}{\sin (x)})$

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

Toca para ver más pasos...

Multiplica $- 1$ por $- 1$ .

$\frac{\cos (x)}{\sin (x)} - \frac{1}{\sin (x)} + \frac{\cos (x)}{\sin (x)} + 1 \frac{1}{\sin (x)}$

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

$\frac{\cos (x)}{\sin (x)} - \frac{1}{\sin (x)} + \frac{\cos (x)}{\sin (x)} + \frac{1}{\sin (x)}$

Combina los numeradores sobre el denominador común.

$\frac{\cos (x) - 1 + \cos (x) + 1}{\sin (x)}$

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

$\frac{2 \cos (x) - 1 + 1}{\sin (x)}$

Suma $- 1$ y $1$ .

$\frac{2 \cos (x) + 0}{\sin (x)}$

Suma $2 \cos (x)$ y $0$ .

$\frac{2 \cos (x)}{\sin (x)}$

Step 13

Reescribe $\frac{2 \cos (x)}{\sin (x)}$ como $2 \cot (x)$ .

$2 \cot (x)$

Step 14

Debido a que se ha demostrado que los dos lados son equivalentes, la ecuación es una identidad.

$\frac{1 - \sec (x)}{\tan (x)} - \frac{\tan (x)}{1 - \sec (x)} = 2 \cot (x)$ es una identidad