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Popular >

0=1.9cos(0.1t)-1.25sin(0.2t)

Solución

0 = 1.9 cos (0.1 t) - 1.25 sin (0.2 t)

Solución

t = 5 π + 20 πn, t = 15 π + 20 πn, t = \frac{0.86331 \dots + 2 πn}{0.1}, t = \frac{π - 0.86331 \dots + 2 πn}{0.1}

Grados

t = 90 0^{\circ} + 360 0^{\circ} n, t = 270 0^{\circ} + 360 0^{\circ} n, t = 494.64197 \dots^{\circ} + 360 0^{\circ} n, t = 1305.35802 \dots^{\circ} + 360 0^{\circ} n

Pasos de solución

0 = 1.9 cos (0.1 t) - 1.25 sin (0.2 t)

Intercambiar lados

1.9 cos (0.1 t) - 1.25 sin (0.2 t) = 0

Sea:

u = 0.1 t

1.9 cos (u) - 1.25 sin (2 u) = 0

Re-escribir usando identidades trigonométricas

- 1.25 sin (2 u) + 1.9 cos (u)

Utilizar la identidad trigonométrica del ángulo doble:

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

= - 1.25 \cdot 2 sin (u) cos (u) + 1.9 cos (u)

Simplificar

= - 2.5 sin (u) cos (u) + 1.9 cos (u)

1.9 cos (u) - 2.5 cos (u) sin (u) = 0

Factorizar

1.9 cos (u) - 2.5 cos (u) sin (u) : - cos (u) (2.5 sin (u) - 1.9)

1.9 cos (u) - 2.5 cos (u) sin (u)

Factorizar el termino común

- cos (u)

= - cos (u) (- 1.9 + 2.5 sin (u))

- cos (u) (2.5 sin (u) - 1.9) = 0

Resolver cada parte por separado

cos (u) = 0 or 2.5 sin (u) - 1.9 = 0

cos (u) = 0 : u = \frac{π}{2} + 2 πn, u = \frac{3 π}{2} + 2 πn

cos (u) = 0

Soluciones generales para

cos (u) = 0

cos (x)

tabla de valores periódicos con

2 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} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

u = \frac{π}{2} + 2 πn, u = \frac{3 π}{2} + 2 πn

u = \frac{π}{2} + 2 πn, u = \frac{3 π}{2} + 2 πn

2.5 sin (u) - 1.9 = 0 : u = arcsin (\frac{19}{25}) + 2 πn, u = π - arcsin (\frac{19}{25}) + 2 πn

2.5 sin (u) - 1.9 = 0

Multiplicar ambos lados por

10

2.5 sin (u) - 1.9 = 0

To eliminate decimal points, multiply by 10 for every digit after the decimal pointThere is one digit to the right of the decimal point, therefore multiply by

10

2.5 sin (u) \cdot 10 - 1.9 \cdot 10 = 0 \cdot 10

Simplificar

25 sin (u) - 19 = 0

25 sin (u) - 19 = 0

Mover

19

al lado derecho

25 sin (u) - 19 = 0

Sumar

19

a ambos lados

25 sin (u) - 19 + 19 = 0 + 19

Simplificar

25 sin (u) = 19

25 sin (u) = 19

Dividir ambos lados entre

25

25 sin (u) = 19

Dividir ambos lados entre

25

\frac{25 sin ( u )}{25} = \frac{19}{25}

Simplificar

sin (u) = \frac{19}{25}

sin (u) = \frac{19}{25}

Aplicar propiedades trigonométricas inversas

sin (u) = \frac{19}{25}

Soluciones generales para

sin (u) = \frac{19}{25}

sin (x) = a \Rightarrow x = arcsin (a) + 2 πn, x = π - arcsin (a) + 2 πn

u = arcsin (\frac{19}{25}) + 2 πn, u = π - arcsin (\frac{19}{25}) + 2 πn

u = arcsin (\frac{19}{25}) + 2 πn, u = π - arcsin (\frac{19}{25}) + 2 πn

Combinar toda las soluciones

u = \frac{π}{2} + 2 πn, u = \frac{3 π}{2} + 2 πn, u = arcsin (\frac{19}{25}) + 2 πn, u = π - arcsin (\frac{19}{25}) + 2 πn

Sustituir en la ecuación

u = 0.1 t

0.1 t = \frac{π}{2} + 2 πn : t = 5 π + 20 πn

0.1 t = \frac{π}{2} + 2 πn

Multiplicar ambos lados por

10

0.1 t = \frac{π}{2} + 2 πn

To eliminate decimal points, multiply by 10 for every digit after the decimal pointThere is one digit to the right of the decimal point, therefore multiply by

10

0.1 t \cdot 10 = \frac{π}{2} \cdot 10 + 2 πn \cdot 10

Simplificar

t = 5 π + 20 πn

t = 5 π + 20 πn

0.1 t = \frac{3 π}{2} + 2 πn : t = 15 π + 20 πn

0.1 t = \frac{3 π}{2} + 2 πn

Multiplicar ambos lados por

10

0.1 t = \frac{3 π}{2} + 2 πn

To eliminate decimal points, multiply by 10 for every digit after the decimal pointThere is one digit to the right of the decimal point, therefore multiply by

10

0.1 t \cdot 10 = \frac{3 π}{2} \cdot 10 + 2 πn \cdot 10

Simplificar

t = 15 π + 20 πn

t = 15 π + 20 πn

0.1 t = arcsin (\frac{19}{25}) + 2 πn : t = \frac{arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

0.1 t = arcsin (\frac{19}{25}) + 2 πn

Dividir ambos lados entre

0.1

0.1 t = arcsin (\frac{19}{25}) + 2 πn

Dividir ambos lados entre

0.1

\frac{0.1 t}{0.1} = \frac{arcsin ( \frac{19}{25} )}{0.1} + \frac{2 πn}{0.1}

Simplificar

\frac{0.1 t}{0.1} = \frac{arcsin ( \frac{19}{25} )}{0.1} + \frac{2 πn}{0.1}

Simplificar

\frac{0.1 t}{0.1} : t

\frac{0.1 t}{0.1}

Eliminar los terminos comunes:

0.1

= t

Simplificar

\frac{arcsin ( \frac{19}{25} )}{0.1} + \frac{2 πn}{0.1} : \frac{arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

\frac{arcsin ( \frac{19}{25} )}{0.1} + \frac{2 πn}{0.1}

Aplicar la regla

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

t = \frac{arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

t = \frac{arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

t = \frac{arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

0.1 t = π - arcsin (\frac{19}{25}) + 2 πn : t = \frac{π - arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

0.1 t = π - arcsin (\frac{19}{25}) + 2 πn

Dividir ambos lados entre

0.1

0.1 t = π - arcsin (\frac{19}{25}) + 2 πn

Dividir ambos lados entre

0.1

\frac{0.1 t}{0.1} = \frac{π}{0.1} - \frac{arcsin ( \frac{19}{25} )}{0.1} + \frac{2 πn}{0.1}

Simplificar

\frac{0.1 t}{0.1} = \frac{π}{0.1} - \frac{arcsin ( \frac{19}{25} )}{0.1} + \frac{2 πn}{0.1}

Simplificar

\frac{0.1 t}{0.1} : t

\frac{0.1 t}{0.1}

Eliminar los terminos comunes:

0.1

= t

Simplificar

\frac{π}{0.1} - \frac{arcsin ( \frac{19}{25} )}{0.1} + \frac{2 πn}{0.1} : \frac{π - arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

\frac{π}{0.1} - \frac{arcsin ( \frac{19}{25} )}{0.1} + \frac{2 πn}{0.1}

Aplicar la regla

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{π - arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

t = \frac{π - arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

t = \frac{π - arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

t = \frac{π - arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

t = 5 π + 20 πn, t = 15 π + 20 πn, t = \frac{arcsin ( \frac{19}{25} ) + 2 πn}{0.1}, t = \frac{π - arcsin ( \frac{19}{25} ) + 2 πn}{0.1}

Mostrar soluciones en forma decimal

t = 5 π + 20 πn, t = 15 π + 20 πn, t = \frac{0.86331 \dots + 2 πn}{0.1}, t = \frac{π - 0.86331 \dots + 2 πn}{0.1}

Ejemplos populares

sin(x/4)=(sqrt(3))/2

sin (\frac{x}{4}) = \frac{3}{2}

cos(θ)=(-3+(-6))/((sqrt(9))(\sqrt{18))}

cos (θ) = \frac{- 3 + ( - 6 )}{( 9 ) ( 18 )}

sin(6/x)=36

sin (\frac{6}{x}) = 36

8cos(2x)+6=cos^2(x)+cos(x)

8 cos (2 x) + 6 = cos^{2} (x) + cos (x)

tan(x)= 200/500

tan (x) = \frac{200}{500}