Sr Examen

Derivada de y=tanln(x+sinx)

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

Ha introducido [src]
tan(x)*log(x + sin(x))
log(x+sin(x))tan(x)\log{\left(x + \sin{\left(x \right)} \right)} \tan{\left(x \right)}
tan(x)*log(x + sin(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)=tan(x)f{\left(x \right)} = \tan{\left(x \right)}; calculamos ddxf(x)\frac{d}{d x} f{\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)}}

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

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

    2. Derivado log(u)\log{\left(u \right)} es 1u\frac{1}{u}.

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

      1. diferenciamos x+sin(x)x + \sin{\left(x \right)} miembro por miembro:

        1. Según el principio, aplicamos: xx tenemos 11

        2. 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: cos(x)+1\cos{\left(x \right)} + 1

      Como resultado de la secuencia de reglas:

      cos(x)+1x+sin(x)\frac{\cos{\left(x \right)} + 1}{x + \sin{\left(x \right)}}

    Como resultado de: (sin2(x)+cos2(x))log(x+sin(x))cos2(x)+(cos(x)+1)tan(x)x+sin(x)\frac{\left(\sin^{2}{\left(x \right)} + \cos^{2}{\left(x \right)}\right) \log{\left(x + \sin{\left(x \right)} \right)}}{\cos^{2}{\left(x \right)}} + \frac{\left(\cos{\left(x \right)} + 1\right) \tan{\left(x \right)}}{x + \sin{\left(x \right)}}

  2. Simplificamos:

    (x+sin(x))log(x+sin(x))+(cos(x)+1)sin(x)cos(x)(x+sin(x))cos2(x)\frac{\left(x + \sin{\left(x \right)}\right) \log{\left(x + \sin{\left(x \right)} \right)} + \left(\cos{\left(x \right)} + 1\right) \sin{\left(x \right)} \cos{\left(x \right)}}{\left(x + \sin{\left(x \right)}\right) \cos^{2}{\left(x \right)}}


Respuesta:

(x+sin(x))log(x+sin(x))+(cos(x)+1)sin(x)cos(x)(x+sin(x))cos2(x)\frac{\left(x + \sin{\left(x \right)}\right) \log{\left(x + \sin{\left(x \right)} \right)} + \left(\cos{\left(x \right)} + 1\right) \sin{\left(x \right)} \cos{\left(x \right)}}{\left(x + \sin{\left(x \right)}\right) \cos^{2}{\left(x \right)}}

Gráfica
02468-8-6-4-2-10102000-1000
Primera derivada [src]
/       2   \                   (1 + cos(x))*tan(x)
\1 + tan (x)/*log(x + sin(x)) + -------------------
                                     x + sin(x)    
(tan2(x)+1)log(x+sin(x))+(cos(x)+1)tan(x)x+sin(x)\left(\tan^{2}{\left(x \right)} + 1\right) \log{\left(x + \sin{\left(x \right)} \right)} + \frac{\left(\cos{\left(x \right)} + 1\right) \tan{\left(x \right)}}{x + \sin{\left(x \right)}}
Segunda derivada [src]
  /            2         \                                                                               
  |(1 + cos(x))          |                                                                               
  |------------- + sin(x)|*tan(x)     /       2   \                                                      
  \  x + sin(x)          /          2*\1 + tan (x)/*(1 + cos(x))     /       2   \                       
- ------------------------------- + ---------------------------- + 2*\1 + tan (x)/*log(x + sin(x))*tan(x)
             x + sin(x)                      x + sin(x)                                                  
2(tan2(x)+1)log(x+sin(x))tan(x)(sin(x)+(cos(x)+1)2x+sin(x))tan(x)x+sin(x)+2(cos(x)+1)(tan2(x)+1)x+sin(x)2 \left(\tan^{2}{\left(x \right)} + 1\right) \log{\left(x + \sin{\left(x \right)} \right)} \tan{\left(x \right)} - \frac{\left(\sin{\left(x \right)} + \frac{\left(\cos{\left(x \right)} + 1\right)^{2}}{x + \sin{\left(x \right)}}\right) \tan{\left(x \right)}}{x + \sin{\left(x \right)}} + \frac{2 \left(\cos{\left(x \right)} + 1\right) \left(\tan^{2}{\left(x \right)} + 1\right)}{x + \sin{\left(x \right)}}
Tercera derivada [src]
/                        3                        \                                                                                                                                          
|          2*(1 + cos(x))    3*(1 + cos(x))*sin(x)|                          /            2         \                                                                                        
|-cos(x) + --------------- + ---------------------|*tan(x)     /       2   \ |(1 + cos(x))          |                                                                                        
|                       2          x + sin(x)     |          3*\1 + tan (x)/*|------------- + sin(x)|                                                       /       2   \                    
\           (x + sin(x))                          /                          \  x + sin(x)          /     /       2   \ /         2   \                   6*\1 + tan (x)/*(1 + cos(x))*tan(x)
---------------------------------------------------------- - ---------------------------------------- + 2*\1 + tan (x)/*\1 + 3*tan (x)/*log(x + sin(x)) + -----------------------------------
                        x + sin(x)                                          x + sin(x)                                                                                 x + sin(x)            
2(tan2(x)+1)(3tan2(x)+1)log(x+sin(x))3(sin(x)+(cos(x)+1)2x+sin(x))(tan2(x)+1)x+sin(x)+6(cos(x)+1)(tan2(x)+1)tan(x)x+sin(x)+(cos(x)+3(cos(x)+1)sin(x)x+sin(x)+2(cos(x)+1)3(x+sin(x))2)tan(x)x+sin(x)2 \left(\tan^{2}{\left(x \right)} + 1\right) \left(3 \tan^{2}{\left(x \right)} + 1\right) \log{\left(x + \sin{\left(x \right)} \right)} - \frac{3 \left(\sin{\left(x \right)} + \frac{\left(\cos{\left(x \right)} + 1\right)^{2}}{x + \sin{\left(x \right)}}\right) \left(\tan^{2}{\left(x \right)} + 1\right)}{x + \sin{\left(x \right)}} + \frac{6 \left(\cos{\left(x \right)} + 1\right) \left(\tan^{2}{\left(x \right)} + 1\right) \tan{\left(x \right)}}{x + \sin{\left(x \right)}} + \frac{\left(- \cos{\left(x \right)} + \frac{3 \left(\cos{\left(x \right)} + 1\right) \sin{\left(x \right)}}{x + \sin{\left(x \right)}} + \frac{2 \left(\cos{\left(x \right)} + 1\right)^{3}}{\left(x + \sin{\left(x \right)}\right)^{2}}\right) \tan{\left(x \right)}}{x + \sin{\left(x \right)}}
Gráfico
Derivada de y=tanln(x+sinx)