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y=sin^2(x)tg(x)

Derivada de y=sin^2(x)tg(x)

Función f() - derivada -er orden en el punto
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Solución

Ha introducido [src]
   2          
sin (x)*tan(x)
sin2(x)tan(x)\sin^{2}{\left(x \right)} \tan{\left(x \right)}
sin(x)^2*tan(x)
Solución detallada
  1. Se aplica la regla de la derivada de una multiplicación:

    ddxf(x)g(x)=f(x)ddxg(x)+g(x)ddxf(x)\frac{d}{d x} f{\left(x \right)} g{\left(x \right)} = f{\left(x \right)} \frac{d}{d x} g{\left(x \right)} + g{\left(x \right)} \frac{d}{d x} f{\left(x \right)}

    f(x)=sin2(x)f{\left(x \right)} = \sin^{2}{\left(x \right)}; calculamos ddxf(x)\frac{d}{d x} f{\left(x \right)}:

    1. Sustituimos u=sin(x)u = \sin{\left(x \right)}.

    2. Según el principio, aplicamos: u2u^{2} tenemos 2u2 u

    3. Luego se aplica una cadena de reglas. Multiplicamos por ddxsin(x)\frac{d}{d x} \sin{\left(x \right)}:

      1. La derivada del seno es igual al coseno:

        ddxsin(x)=cos(x)\frac{d}{d x} \sin{\left(x \right)} = \cos{\left(x \right)}

      Como resultado de la secuencia de reglas:

      2sin(x)cos(x)2 \sin{\left(x \right)} \cos{\left(x \right)}

    g(x)=tan(x)g{\left(x \right)} = \tan{\left(x \right)}; calculamos ddxg(x)\frac{d}{d x} g{\left(x \right)}:

    1. Reescribimos las funciones para diferenciar:

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

    2. Se aplica la regla de la derivada parcial:

      ddxf(x)g(x)=f(x)ddxg(x)+g(x)ddxf(x)g2(x)\frac{d}{d x} \frac{f{\left(x \right)}}{g{\left(x \right)}} = \frac{- f{\left(x \right)} \frac{d}{d x} g{\left(x \right)} + g{\left(x \right)} \frac{d}{d x} f{\left(x \right)}}{g^{2}{\left(x \right)}}

      f(x)=sin(x)f{\left(x \right)} = \sin{\left(x \right)} y g(x)=cos(x)g{\left(x \right)} = \cos{\left(x \right)}.

      Para calcular ddxf(x)\frac{d}{d x} f{\left(x \right)}:

      1. La derivada del seno es igual al coseno:

        ddxsin(x)=cos(x)\frac{d}{d x} \sin{\left(x \right)} = \cos{\left(x \right)}

      Para calcular ddxg(x)\frac{d}{d x} g{\left(x \right)}:

      1. La derivada del coseno es igual a menos el seno:

        ddxcos(x)=sin(x)\frac{d}{d x} \cos{\left(x \right)} = - \sin{\left(x \right)}

      Ahora aplicamos la regla de la derivada de una divesión:

      sin2(x)+cos2(x)cos2(x)\frac{\sin^{2}{\left(x \right)} + \cos^{2}{\left(x \right)}}{\cos^{2}{\left(x \right)}}

    Como resultado de: (sin2(x)+cos2(x))sin2(x)cos2(x)+2sin(x)cos(x)tan(x)\frac{\left(\sin^{2}{\left(x \right)} + \cos^{2}{\left(x \right)}\right) \sin^{2}{\left(x \right)}}{\cos^{2}{\left(x \right)}} + 2 \sin{\left(x \right)} \cos{\left(x \right)} \tan{\left(x \right)}

  2. Simplificamos:

    2sin2(x)+tan2(x)2 \sin^{2}{\left(x \right)} + \tan^{2}{\left(x \right)}


Respuesta:

2sin2(x)+tan2(x)2 \sin^{2}{\left(x \right)} + \tan^{2}{\left(x \right)}

Gráfica
02468-8-6-4-2-1010-10001000
Primera derivada [src]
   2    /       2   \                         
sin (x)*\1 + tan (x)/ + 2*cos(x)*sin(x)*tan(x)
(tan2(x)+1)sin2(x)+2sin(x)cos(x)tan(x)\left(\tan^{2}{\left(x \right)} + 1\right) \sin^{2}{\left(x \right)} + 2 \sin{\left(x \right)} \cos{\left(x \right)} \tan{\left(x \right)}
Segunda derivada [src]
  /  /   2         2   \             2    /       2   \            /       2   \              \
2*\- \sin (x) - cos (x)/*tan(x) + sin (x)*\1 + tan (x)/*tan(x) + 2*\1 + tan (x)/*cos(x)*sin(x)/
2((sin2(x)cos2(x))tan(x)+(tan2(x)+1)sin2(x)tan(x)+2(tan2(x)+1)sin(x)cos(x))2 \left(- \left(\sin^{2}{\left(x \right)} - \cos^{2}{\left(x \right)}\right) \tan{\left(x \right)} + \left(\tan^{2}{\left(x \right)} + 1\right) \sin^{2}{\left(x \right)} \tan{\left(x \right)} + 2 \left(\tan^{2}{\left(x \right)} + 1\right) \sin{\left(x \right)} \cos{\left(x \right)}\right)
Tercera derivada [src]
  /    /       2   \ /   2         2   \      2    /       2   \ /         2   \                              /       2   \                     \
2*\- 3*\1 + tan (x)/*\sin (x) - cos (x)/ + sin (x)*\1 + tan (x)/*\1 + 3*tan (x)/ - 4*cos(x)*sin(x)*tan(x) + 6*\1 + tan (x)/*cos(x)*sin(x)*tan(x)/
2(3(sin2(x)cos2(x))(tan2(x)+1)+(tan2(x)+1)(3tan2(x)+1)sin2(x)+6(tan2(x)+1)sin(x)cos(x)tan(x)4sin(x)cos(x)tan(x))2 \left(- 3 \left(\sin^{2}{\left(x \right)} - \cos^{2}{\left(x \right)}\right) \left(\tan^{2}{\left(x \right)} + 1\right) + \left(\tan^{2}{\left(x \right)} + 1\right) \left(3 \tan^{2}{\left(x \right)} + 1\right) \sin^{2}{\left(x \right)} + 6 \left(\tan^{2}{\left(x \right)} + 1\right) \sin{\left(x \right)} \cos{\left(x \right)} \tan{\left(x \right)} - 4 \sin{\left(x \right)} \cos{\left(x \right)} \tan{\left(x \right)}\right)
Gráfico
Derivada de y=sin^2(x)tg(x)