Trigonometría Ejemplos

${(2 \cos (t) - 4 \sin (t))}^{2} + {(4 \cos (t) + 2 \sin (t))}^{2} = 20$

Step 1

Eleva al cuadrado ambos lados de la ecuación.

${({(2 \cos (t) - 4 \sin (t))}^{2} + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Step 2

Simplifica ${({(2 \cos (t) - 4 \sin (t))}^{2} + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2}$ .

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Simplifica cada término.

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Reescribe ${(2 \cos (t) - 4 \sin (t))}^{2}$ como $(2 \cos (t) - 4 \sin (t)) (2 \cos (t) - 4 \sin (t))$ .

${((2 \cos (t) - 4 \sin (t)) (2 \cos (t) - 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Expande $(2 \cos (t) - 4 \sin (t)) (2 \cos (t) - 4 \sin (t))$ con el método PEIU (primero, exterior, interior, ultimo).

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Aplica la propiedad distributiva.

${(2 \cos (t) (2 \cos (t) - 4 \sin (t)) - 4 \sin (t) (2 \cos (t) - 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Aplica la propiedad distributiva.

${(2 \cos (t) (2 \cos (t)) + 2 \cos (t) (- 4 \sin (t)) - 4 \sin (t) (2 \cos (t) - 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Aplica la propiedad distributiva.

${(2 \cos (t) (2 \cos (t)) + 2 \cos (t) (- 4 \sin (t)) - 4 \sin (t) (2 \cos (t)) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Simplifica y combina los términos similares.

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Simplifica cada término.

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Multiplica $2 \cos (t) (2 \cos (t))$ .

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Multiplica $2$ por $2$ .

${(4 \cos (t) \cos (t) + 2 \cos (t) (- 4 \sin (t)) - 4 \sin (t) (2 \cos (t)) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

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

${(4 (\cos^{1} (t) \cos (t)) + 2 \cos (t) (- 4 \sin (t)) - 4 \sin (t) (2 \cos (t)) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

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

${(4 (\cos^{1} (t) \cos^{1} (t)) + 2 \cos (t) (- 4 \sin (t)) - 4 \sin (t) (2 \cos (t)) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

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

${(4 {\cos (t)}^{1 + 1} + 2 \cos (t) (- 4 \sin (t)) - 4 \sin (t) (2 \cos (t)) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Suma $1$ y $1$ .

${(4 \cos^{2} (t) + 2 \cos (t) (- 4 \sin (t)) - 4 \sin (t) (2 \cos (t)) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Reordena $2 \cos (t)$ y $- 4 \sin (t)$ .

${(4 \cos^{2} (t) - 4 \sin (t) (2 \cos (t)) - 4 \sin (t) (2 \cos (t)) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Agrega paréntesis.

${(4 \cos^{2} (t) - 4 (\sin (t) (2 \cos (t))) - 4 \sin (t) (2 \cos (t)) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Reordena $\sin (t)$ y $2$ .

${(4 \cos^{2} (t) - 4 (2 \cdot \sin (t) \cos (t)) - 4 \sin (t) (2 \cos (t)) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Aplica la razón del ángulo doble sinusoidal.

${(4 \cos^{2} (t) - 4 \sin (2 t) - 4 \sin (t) (2 \cos (t)) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Agrega paréntesis.

${(4 \cos^{2} (t) - 4 \sin (2 t) - 4 (\sin (t) (2 \cos (t))) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Reordena $\sin (t)$ y $2$ .

${(4 \cos^{2} (t) - 4 \sin (2 t) - 4 (2 \cdot \sin (t) \cos (t)) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Aplica la razón del ángulo doble sinusoidal.

${(4 \cos^{2} (t) - 4 \sin (2 t) - 4 \sin (2 t) - 4 \sin (t) (- 4 \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Multiplica $- 4 \sin (t) (- 4 \sin (t))$ .

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Multiplica $- 4$ por $- 4$ .

${(4 \cos^{2} (t) - 4 \sin (2 t) - 4 \sin (2 t) + 16 \sin (t) \sin (t) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

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

${(4 \cos^{2} (t) - 4 \sin (2 t) - 4 \sin (2 t) + 16 (\sin^{1} (t) \sin (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

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

${(4 \cos^{2} (t) - 4 \sin (2 t) - 4 \sin (2 t) + 16 (\sin^{1} (t) \sin^{1} (t)) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

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

${(4 \cos^{2} (t) - 4 \sin (2 t) - 4 \sin (2 t) + 16 {\sin (t)}^{1 + 1} + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Suma $1$ y $1$ .

${(4 \cos^{2} (t) - 4 \sin (2 t) - 4 \sin (2 t) + 16 \sin^{2} (t) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Resta $4 \sin (2 t)$ de $- 4 \sin (2 t)$ .

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + {(4 \cos (t) + 2 \sin (t))}^{2})}^{2} = {(20)}^{2}$

Reescribe ${(4 \cos (t) + 2 \sin (t))}^{2}$ como $(4 \cos (t) + 2 \sin (t)) (4 \cos (t) + 2 \sin (t))$ .

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + (4 \cos (t) + 2 \sin (t)) (4 \cos (t) + 2 \sin (t)))}^{2} = {(20)}^{2}$

Expande $(4 \cos (t) + 2 \sin (t)) (4 \cos (t) + 2 \sin (t))$ con el método PEIU (primero, exterior, interior, ultimo).

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Aplica la propiedad distributiva.

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 4 \cos (t) (4 \cos (t) + 2 \sin (t)) + 2 \sin (t) (4 \cos (t) + 2 \sin (t)))}^{2} = {(20)}^{2}$

Aplica la propiedad distributiva.

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 4 \cos (t) (4 \cos (t)) + 4 \cos (t) (2 \sin (t)) + 2 \sin (t) (4 \cos (t) + 2 \sin (t)))}^{2} = {(20)}^{2}$

Aplica la propiedad distributiva.

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 4 \cos (t) (4 \cos (t)) + 4 \cos (t) (2 \sin (t)) + 2 \sin (t) (4 \cos (t)) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

Simplifica y combina los términos similares.

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Simplifica cada término.

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Multiplica $4 \cos (t) (4 \cos (t))$ .

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Multiplica $4$ por $4$ .

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos (t) \cos (t) + 4 \cos (t) (2 \sin (t)) + 2 \sin (t) (4 \cos (t)) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

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

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 (\cos^{1} (t) \cos (t)) + 4 \cos (t) (2 \sin (t)) + 2 \sin (t) (4 \cos (t)) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

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

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 (\cos^{1} (t) \cos^{1} (t)) + 4 \cos (t) (2 \sin (t)) + 2 \sin (t) (4 \cos (t)) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

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

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 {\cos (t)}^{1 + 1} + 4 \cos (t) (2 \sin (t)) + 2 \sin (t) (4 \cos (t)) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

Suma $1$ y $1$ .

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \cos (t) (2 \sin (t)) + 2 \sin (t) (4 \cos (t)) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

Agrega paréntesis.

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 (\cos (t) (2 \sin (t))) + 2 \sin (t) (4 \cos (t)) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

Reordena $\cos (t)$ y $2 \sin (t)$ .

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 (2 \sin (t) \cos (t)) + 2 \sin (t) (4 \cos (t)) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

Aplica la razón del ángulo doble sinusoidal.

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin (2 t) + 2 \sin (t) (4 \cos (t)) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

Reordena $2 \sin (t)$ y $4 \cos (t)$ .

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin (2 t) + 4 \cos (t) (2 \sin (t)) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

Agrega paréntesis.

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin (2 t) + 4 (\cos (t) (2 \sin (t))) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

Reordena $\cos (t)$ y $2 \sin (t)$ .

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin (2 t) + 4 (2 \sin (t) \cos (t)) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

Aplica la razón del ángulo doble sinusoidal.

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin (2 t) + 4 \sin (2 t) + 2 \sin (t) (2 \sin (t)))}^{2} = {(20)}^{2}$

Multiplica $2 \sin (t) (2 \sin (t))$ .

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Multiplica $2$ por $2$ .

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin (2 t) + 4 \sin (2 t) + 4 \sin (t) \sin (t))}^{2} = {(20)}^{2}$

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

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin (2 t) + 4 \sin (2 t) + 4 (\sin^{1} (t) \sin (t)))}^{2} = {(20)}^{2}$

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

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin (2 t) + 4 \sin (2 t) + 4 (\sin^{1} (t) \sin^{1} (t)))}^{2} = {(20)}^{2}$

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

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin (2 t) + 4 \sin (2 t) + 4 {\sin (t)}^{1 + 1})}^{2} = {(20)}^{2}$

Suma $1$ y $1$ .

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin (2 t) + 4 \sin (2 t) + 4 \sin^{2} (t))}^{2} = {(20)}^{2}$

Suma $4 \sin (2 t)$ y $4 \sin (2 t)$ .

${(4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 8 \sin (2 t) + 4 \sin^{2} (t))}^{2} = {(20)}^{2}$

Simplifica los términos.

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Combina los términos opuestos en $4 \cos^{2} (t) - 8 \sin (2 t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 8 \sin (2 t) + 4 \sin^{2} (t)$ .

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Suma $- 8 \sin (2 t)$ y $8 \sin (2 t)$ .

${(4 \cos^{2} (t) + 0 + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin^{2} (t))}^{2} = {(20)}^{2}$

Suma $4 \cos^{2} (t)$ y $0$ .

${(4 \cos^{2} (t) + 16 \sin^{2} (t) + 16 \cos^{2} (t) + 4 \sin^{2} (t))}^{2} = {(20)}^{2}$

Mueve $4 \sin^{2} (t)$ .

${(4 \cos^{2} (t) + 4 \sin^{2} (t) + 16 \sin^{2} (t) + 16 \cos^{2} (t))}^{2} = {(20)}^{2}$

Factoriza $4$ de $4 \cos^{2} (t)$ .

${(4 (\cos^{2} (t)) + 4 \sin^{2} (t) + 16 \sin^{2} (t) + 16 \cos^{2} (t))}^{2} = {(20)}^{2}$

Factoriza $4$ de $4 \sin^{2} (t)$ .

${(4 (\cos^{2} (t)) + 4 (\sin^{2} (t)) + 16 \sin^{2} (t) + 16 \cos^{2} (t))}^{2} = {(20)}^{2}$

Factoriza $4$ de $4 (\cos^{2} (t)) + 4 (\sin^{2} (t))$ .

${(4 (\cos^{2} (t) + \sin^{2} (t)) + 16 \sin^{2} (t) + 16 \cos^{2} (t))}^{2} = {(20)}^{2}$

Reorganiza los términos.

${(4 (\sin^{2} (t) + \cos^{2} (t)) + 16 \sin^{2} (t) + 16 \cos^{2} (t))}^{2} = {(20)}^{2}$

Aplica la identidad pitagórica.

${(4 \cdot 1 + 16 \sin^{2} (t) + 16 \cos^{2} (t))}^{2} = {(20)}^{2}$

Simplifica con la obtención del factor común.

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Factoriza $16$ de $16 \sin^{2} (t)$ .

${(4 \cdot 1 + 16 (\sin^{2} (t)) + 16 \cos^{2} (t))}^{2} = {(20)}^{2}$

Factoriza $16$ de $16 \cos^{2} (t)$ .

${(4 \cdot 1 + 16 (\sin^{2} (t)) + 16 (\cos^{2} (t)))}^{2} = {(20)}^{2}$

Factoriza $16$ de $16 (\sin^{2} (t)) + 16 (\cos^{2} (t))$ .

${(4 \cdot 1 + 16 (\sin^{2} (t) + \cos^{2} (t)))}^{2} = {(20)}^{2}$

Aplica la identidad pitagórica.

${(4 \cdot 1 + 16 \cdot 1)}^{2} = {(20)}^{2}$

Simplifica los términos.

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Simplifica cada término.

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Multiplica $4$ por $1$ .

${(4 + 16 \cdot 1)}^{2} = {(20)}^{2}$

Multiplica $16$ por $1$ .

${(4 + 16)}^{2} = {(20)}^{2}$

Simplifica la expresión.

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Suma $4$ y $16$ .

$20^{2} = {(20)}^{2}$

Eleva $20$ a la potencia de $2$ .

$400 = {(20)}^{2}$

Step 3

Eleva $20$ a la potencia de $2$ .

$400 = 400$

Step 4

Como $400 = 400$ , la ecuación siempre será verdadera para cualquier valor de $t$ .

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Step 5

El resultado puede mostrarse de distintas formas.

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Notación de intervalo:

$(- \infty, \infty)$