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Popular Trigonometría >

sin^6(x)-cos^6(x)=0

Solución

sin^{6} (x) - cos^{6} (x) = 0

Solución

x = \frac{π}{4} + πn, x = \frac{3 π}{4} + πn

Grados

x = 4 5^{\circ} + 18 0^{\circ} n, x = 13 5^{\circ} + 18 0^{\circ} n

Pasos de solución

sin^{6} (x) - cos^{6} (x) = 0

Factorizar

sin^{6} (x) - cos^{6} (x) : (sin (x) + cos (x)) (sin^{2} (x) - sin (x) cos (x) + cos^{2} (x)) (sin (x) - cos (x)) (sin^{2} (x) + sin (x) cos (x) + cos^{2} (x))

sin^{6} (x) - cos^{6} (x)

Reescribir

sin^{6} (x) - cos^{6} (x)

como

(sin^{3} (x))^{2} - (cos^{3} (x))^{2}

sin^{6} (x) - cos^{6} (x)

Aplicar las leyes de los exponentes:

a^{b c} = (a^{b})^{c}

sin^{6} (x) = (sin^{3} (x))^{2}

= (sin^{3} (x))^{2} - cos^{6} (x)

Aplicar las leyes de los exponentes:

a^{b c} = (a^{b})^{c}

cos^{6} (x) = (cos^{3} (x))^{2}

= (sin^{3} (x))^{2} - (cos^{3} (x))^{2}

= (sin^{3} (x))^{2} - (cos^{3} (x))^{2}

Aplicar la siguiente regla para binomios al cuadrado:

x^{2} - y^{2} = (x + y) (x - y)

(sin^{3} (x))^{2} - (cos^{3} (x))^{2} = (sin^{3} (x) + cos^{3} (x)) (sin^{3} (x) - cos^{3} (x))

= (sin^{3} (x) + cos^{3} (x)) (sin^{3} (x) - cos^{3} (x))

Factorizar

sin^{3} (x) + cos^{3} (x) : (sin (x) + cos (x)) (sin^{2} (x) - sin (x) cos (x) + cos^{2} (x))

sin^{3} (x) + cos^{3} (x)

Aplicar la siguiente regla de productos notables (Suma de cubos):

x^{3} + y^{3} = (x + y) (x^{2} - x y + y^{2})

sin^{3} (x) + cos^{3} (x) = (sin (x) + cos (x)) (sin^{2} (x) - sin (x) cos (x) + cos^{2} (x))

= (sin (x) + cos (x)) (sin^{2} (x) - sin (x) cos (x) + cos^{2} (x))

= (sin (x) + cos (x)) (sin^{2} (x) - sin (x) cos (x) + cos^{2} (x)) (sin^{3} (x) - cos^{3} (x))

Factorizar

sin^{3} (x) - cos^{3} (x) : (sin (x) - cos (x)) (sin^{2} (x) + sin (x) cos (x) + cos^{2} (x))

sin^{3} (x) - cos^{3} (x)

Aplicar la siguiente regla de productos notables (Diferencia de cubos):

x^{3} - y^{3} = (x - y) (x^{2} + x y + y^{2})

sin^{3} (x) - cos^{3} (x) = (sin (x) - cos (x)) (sin^{2} (x) + sin (x) cos (x) + cos^{2} (x))

= (sin (x) - cos (x)) (sin^{2} (x) + sin (x) cos (x) + cos^{2} (x))

= (sin (x) + cos (x)) (sin^{2} (x) - sin (x) cos (x) + cos^{2} (x)) (sin (x) - cos (x)) (sin^{2} (x) + sin (x) cos (x) + cos^{2} (x))

(sin (x) + cos (x)) (sin^{2} (x) - sin (x) cos (x) + cos^{2} (x)) (sin (x) - cos (x)) (sin^{2} (x) + sin (x) cos (x) + cos^{2} (x)) = 0

Re-escribir usando identidades trigonométricas

(sin (x) + cos (x)) (sin^{2} (x) - sin (x) cos (x) + cos^{2} (x)) (sin (x) - cos (x)) (sin^{2} (x) + sin (x) cos (x) + cos^{2} (x))

Utilizar la identidad pitagórica:

cos^{2} (x) + sin^{2} (x) = 1

= (- cos (x) + sin (x)) (cos (x) + sin (x)) (cos (x) sin (x) + 1) (cos^{2} (x) + sin^{2} (x) - cos (x) sin (x))

(- cos (x) + sin (x)) (cos (x) + sin (x)) (cos (x) sin (x) + 1) (cos^{2} (x) + sin^{2} (x) - cos (x) sin (x)) = 0

Resolver cada parte por separado

- cos (x) + sin (x) = 0 or cos (x) + sin (x) = 0 or cos (x) sin (x) + 1 = 0 or cos^{2} (x) + sin^{2} (x) - cos (x) sin (x) = 0

- cos (x) + sin (x) = 0 : x = \frac{π}{4} + πn

- cos (x) + sin (x) = 0

Re-escribir usando identidades trigonométricas

- cos (x) + sin (x) = 0

Dividir ambos lados entre

cos (x), cos (x) \neq = 0

\frac{- cos ( x ) + sin ( x )}{cos ( x )} = \frac{0}{cos ( x )}

Simplificar

- 1 + \frac{sin ( x )}{cos ( x )} = 0

Utilizar la identidad trigonométrica básica:

\frac{sin ( x )}{cos ( x )} = tan (x)

- 1 + tan (x) = 0

- 1 + tan (x) = 0

Desplace

1

a la derecha

- 1 + tan (x) = 0

Sumar

1

a ambos lados

- 1 + tan (x) + 1 = 0 + 1

Simplificar

tan (x) = 1

tan (x) = 1

Soluciones generales para

tan (x) = 1

tan (x)

tabla de valores periódicos con

πn

intervalos:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} tan (x) 0 \frac{3}{3} 13 \pm \infty - 3 - 1 - \frac{3}{3}

x = \frac{π}{4} + πn

x = \frac{π}{4} + πn

cos (x) + sin (x) = 0 : x = \frac{3 π}{4} + πn

cos (x) + sin (x) = 0

Re-escribir usando identidades trigonométricas

cos (x) + sin (x) = 0

Dividir ambos lados entre

cos (x), cos (x) \neq = 0

\frac{cos ( x ) + sin ( x )}{cos ( x )} = \frac{0}{cos ( x )}

Simplificar

1 + \frac{sin ( x )}{cos ( x )} = 0

Utilizar la identidad trigonométrica básica:

\frac{sin ( x )}{cos ( x )} = tan (x)

1 + tan (x) = 0

1 + tan (x) = 0

Desplace

1

a la derecha

1 + tan (x) = 0

Restar

1

de ambos lados

1 + tan (x) - 1 = 0 - 1

Simplificar

tan (x) = - 1

tan (x) = - 1

Soluciones generales para

tan (x) = - 1

tan (x)

tabla de valores periódicos con

πn

intervalos:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} tan (x) 0 \frac{3}{3} 13 \pm \infty - 3 - 1 - \frac{3}{3}

x = \frac{3 π}{4} + πn

x = \frac{3 π}{4} + πn

cos (x) sin (x) + 1 = 0 :

Sin solución

cos (x) sin (x) + 1 = 0

Re-escribir usando identidades trigonométricas

cos (x) sin (x) + 1

Utilizar la identidad trigonométrica del ángulo doble:

2 sin (x) cos (x) = sin (2 x)

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

= 1 + \frac{sin ( 2 x )}{2}

1 + \frac{sin ( 2 x )}{2} = 0

Desplace

1

a la derecha

1 + \frac{sin ( 2 x )}{2} = 0

Restar

1

de ambos lados

1 + \frac{sin ( 2 x )}{2} - 1 = 0 - 1

Simplificar

\frac{sin ( 2 x )}{2} = - 1

\frac{sin ( 2 x )}{2} = - 1

Multiplicar ambos lados por

2

\frac{sin ( 2 x )}{2} = - 1

Multiplicar ambos lados por

2

\frac{2 sin ( 2 x )}{2} = 2 (- 1)

Simplificar

sin (2 x) = - 2

sin (2 x) = - 2

- 1 \leq sin (x) \leq 1

Sin soluci \overset{o}{ˊ} n

cos^{2} (x) + sin^{2} (x) - cos (x) sin (x) = 0 :

Sin solución

cos^{2} (x) + sin^{2} (x) - cos (x) sin (x) = 0

Re-escribir usando identidades trigonométricas

- cos (x) sin (x) + 1

Utilizar la identidad trigonométrica del ángulo doble:

2 sin (x) cos (x) = sin (2 x)

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

= 1 - \frac{sin ( 2 x )}{2}

1 - \frac{sin ( 2 x )}{2} = 0

Desplace

1

a la derecha

1 - \frac{sin ( 2 x )}{2} = 0

Restar

1

de ambos lados

1 - \frac{sin ( 2 x )}{2} - 1 = 0 - 1

Simplificar

- \frac{sin ( 2 x )}{2} = - 1

- \frac{sin ( 2 x )}{2} = - 1

Multiplicar ambos lados por

2

- \frac{sin ( 2 x )}{2} = - 1

Multiplicar ambos lados por

2

2 (- \frac{sin ( 2 x )}{2}) = 2 (- 1)

Simplificar

- sin (2 x) = - 2

- sin (2 x) = - 2

Dividir ambos lados entre

- 1

- sin (2 x) = - 2

Dividir ambos lados entre

- 1

\frac{- sin ( 2 x )}{- 1} = \frac{- 2}{- 1}

Simplificar

sin (2 x) = 2

sin (2 x) = 2

- 1 \leq sin (x) \leq 1

Sin soluci \overset{o}{ˊ} n

Combinar toda las soluciones

x = \frac{π}{4} + πn, x = \frac{3 π}{4} + πn

Gráfica

Ejemplos populares

-sin(2x)sin(x)+cos(2x)cos(x)=0

sin(2x)+cos(2x)-1=0

4tan(x)sin^2(x)+3=4sin^2(x)+3tan(x)

tan(a)=0.384

cos(b)= 38/70