Sr Examen

Derivada de y=√sinx÷sin√x

Función f() - derivada -er orden en el punto
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Gráfico:

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Solución

Ha introducido [src]
  ________
\/ sin(x) 
----------
   /  ___\
sin\\/ x /
sin(x)sin(x)\frac{\sqrt{\sin{\left(x \right)}}}{\sin{\left(\sqrt{x} \right)}}
sqrt(sin(x))/sin(sqrt(x))
Solución detallada
  1. 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)} = \sqrt{\sin{\left(x \right)}} y g(x)=sin(x)g{\left(x \right)} = \sin{\left(\sqrt{x} \right)}.

    Para calcular 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: u\sqrt{u} tenemos 12u\frac{1}{2 \sqrt{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:

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

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

    1. Sustituimos u=xu = \sqrt{x}.

    2. La derivada del seno es igual al coseno:

      ddusin(u)=cos(u)\frac{d}{d u} \sin{\left(u \right)} = \cos{\left(u \right)}

    3. Luego se aplica una cadena de reglas. Multiplicamos por ddxx\frac{d}{d x} \sqrt{x}:

      1. Según el principio, aplicamos: x\sqrt{x} tenemos 12x\frac{1}{2 \sqrt{x}}

      Como resultado de la secuencia de reglas:

      cos(x)2x\frac{\cos{\left(\sqrt{x} \right)}}{2 \sqrt{x}}

    Ahora aplicamos la regla de la derivada de una divesión:

    sin(x)cos(x)2sin(x)sin(x)cos(x)2xsin2(x)\frac{\frac{\sin{\left(\sqrt{x} \right)} \cos{\left(x \right)}}{2 \sqrt{\sin{\left(x \right)}}} - \frac{\sqrt{\sin{\left(x \right)}} \cos{\left(\sqrt{x} \right)}}{2 \sqrt{x}}}{\sin^{2}{\left(\sqrt{x} \right)}}

  2. Simplificamos:

    xsin(x)cos(x)sin(x)cos(x)2xsin2(x)sin(x)\frac{\sqrt{x} \sin{\left(\sqrt{x} \right)} \cos{\left(x \right)} - \sin{\left(x \right)} \cos{\left(\sqrt{x} \right)}}{2 \sqrt{x} \sin^{2}{\left(\sqrt{x} \right)} \sqrt{\sin{\left(x \right)}}}


Respuesta:

xsin(x)cos(x)sin(x)cos(x)2xsin2(x)sin(x)\frac{\sqrt{x} \sin{\left(\sqrt{x} \right)} \cos{\left(x \right)} - \sin{\left(x \right)} \cos{\left(\sqrt{x} \right)}}{2 \sqrt{x} \sin^{2}{\left(\sqrt{x} \right)} \sqrt{\sin{\left(x \right)}}}

Gráfica
02468-8-6-4-2-1010-5050
Primera derivada [src]
                            ________    /  ___\
         cos(x)           \/ sin(x) *cos\\/ x /
----------------------- - ---------------------
    ________    /  ___\        ___    2/  ___\ 
2*\/ sin(x) *sin\\/ x /    2*\/ x *sin \\/ x / 
cos(x)2sin(x)sin(x)sin(x)cos(x)2xsin2(x)\frac{\cos{\left(x \right)}}{2 \sin{\left(\sqrt{x} \right)} \sqrt{\sin{\left(x \right)}}} - \frac{\sqrt{\sin{\left(x \right)}} \cos{\left(\sqrt{x} \right)}}{2 \sqrt{x} \sin^{2}{\left(\sqrt{x} \right)}}
Segunda derivada [src]
                            /          /  ___\          2/  ___\\       2                       /  ___\    
      ________     ________ |1      cos\\/ x /     2*cos \\/ x /|    cos (x)        2*cos(x)*cos\\/ x /    
- 2*\/ sin(x)  + \/ sin(x) *|- + --------------- + -------------| - --------- - ---------------------------
                            |x    3/2    /  ___\        2/  ___\|      3/2        ___   ________    /  ___\
                            \    x   *sin\\/ x /   x*sin \\/ x //   sin   (x)   \/ x *\/ sin(x) *sin\\/ x /
-----------------------------------------------------------------------------------------------------------
                                                     /  ___\                                               
                                                4*sin\\/ x /                                               
(1x+2cos2(x)xsin2(x)+cos(x)x32sin(x))sin(x)2sin(x)cos2(x)sin32(x)2cos(x)cos(x)xsin(x)sin(x)4sin(x)\frac{\left(\frac{1}{x} + \frac{2 \cos^{2}{\left(\sqrt{x} \right)}}{x \sin^{2}{\left(\sqrt{x} \right)}} + \frac{\cos{\left(\sqrt{x} \right)}}{x^{\frac{3}{2}} \sin{\left(\sqrt{x} \right)}}\right) \sqrt{\sin{\left(x \right)}} - 2 \sqrt{\sin{\left(x \right)}} - \frac{\cos^{2}{\left(x \right)}}{\sin^{\frac{3}{2}}{\left(x \right)}} - \frac{2 \cos{\left(\sqrt{x} \right)} \cos{\left(x \right)}}{\sqrt{x} \sin{\left(\sqrt{x} \right)} \sqrt{\sin{\left(x \right)}}}}{4 \sin{\left(\sqrt{x} \right)}}
Tercera derivada [src]
                                                                                            /         2   \            /          /  ___\          2/  ___\\            /                   2    \           
                                                                                            |    3*cos (x)|            |1      cos\\/ x /     2*cos \\/ x /|            |    ________    cos (x) |    /  ___\
                                                                                            |2 + ---------|*cos(x)   3*|- + --------------- + -------------|*cos(x)   3*|2*\/ sin(x)  + ---------|*cos\\/ x /
             /            /  ___\           /  ___\         2/  ___\          3/  ___\  \   |        2    |            |x    3/2    /  ___\        2/  ___\|            |                  3/2   |           
    ________ |3      3*cos\\/ x /      5*cos\\/ x /    6*cos \\/ x /     6*cos \\/ x /  |   \     sin (x) /            \    x   *sin\\/ x /   x*sin \\/ x //            \               sin   (x)/           
- \/ sin(x) *|-- + --------------- + --------------- + -------------- + ----------------| + ---------------------- + ---------------------------------------------- + ---------------------------------------
             | 2    5/2    /  ___\    3/2    /  ___\    2    2/  ___\    3/2    3/  ___\|           ________                             ________                                   ___    /  ___\           
             \x    x   *sin\\/ x /   x   *sin\\/ x /   x *sin \\/ x /   x   *sin \\/ x //         \/ sin(x)                            \/ sin(x)                                  \/ x *sin\\/ x /           
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      /  ___\                                                                                                
                                                                                                 8*sin\\/ x /                                                                                                
(2+3cos2(x)sin2(x))cos(x)sin(x)+3(1x+2cos2(x)xsin2(x)+cos(x)x32sin(x))cos(x)sin(x)(3x2+6cos2(x)x2sin2(x)+5cos(x)x32sin(x)+6cos3(x)x32sin3(x)+3cos(x)x52sin(x))sin(x)+3(2sin(x)+cos2(x)sin32(x))cos(x)xsin(x)8sin(x)\frac{\frac{\left(2 + \frac{3 \cos^{2}{\left(x \right)}}{\sin^{2}{\left(x \right)}}\right) \cos{\left(x \right)}}{\sqrt{\sin{\left(x \right)}}} + \frac{3 \left(\frac{1}{x} + \frac{2 \cos^{2}{\left(\sqrt{x} \right)}}{x \sin^{2}{\left(\sqrt{x} \right)}} + \frac{\cos{\left(\sqrt{x} \right)}}{x^{\frac{3}{2}} \sin{\left(\sqrt{x} \right)}}\right) \cos{\left(x \right)}}{\sqrt{\sin{\left(x \right)}}} - \left(\frac{3}{x^{2}} + \frac{6 \cos^{2}{\left(\sqrt{x} \right)}}{x^{2} \sin^{2}{\left(\sqrt{x} \right)}} + \frac{5 \cos{\left(\sqrt{x} \right)}}{x^{\frac{3}{2}} \sin{\left(\sqrt{x} \right)}} + \frac{6 \cos^{3}{\left(\sqrt{x} \right)}}{x^{\frac{3}{2}} \sin^{3}{\left(\sqrt{x} \right)}} + \frac{3 \cos{\left(\sqrt{x} \right)}}{x^{\frac{5}{2}} \sin{\left(\sqrt{x} \right)}}\right) \sqrt{\sin{\left(x \right)}} + \frac{3 \left(2 \sqrt{\sin{\left(x \right)}} + \frac{\cos^{2}{\left(x \right)}}{\sin^{\frac{3}{2}}{\left(x \right)}}\right) \cos{\left(\sqrt{x} \right)}}{\sqrt{x} \sin{\left(\sqrt{x} \right)}}}{8 \sin{\left(\sqrt{x} \right)}}
Gráfico
Derivada de y=√sinx÷sin√x