Sr Examen

Derivada de y=cos2x*arctg3x

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

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Solución

Ha introducido [src]
cos(2*x)*atan(3*x)
$$\cos{\left(2 x \right)} \operatorname{atan}{\left(3 x \right)}$$
cos(2*x)*atan(3*x)
Gráfica
Primera derivada [src]
                        3*cos(2*x)
-2*atan(3*x)*sin(2*x) + ----------
                                2 
                         1 + 9*x  
$$- 2 \sin{\left(2 x \right)} \operatorname{atan}{\left(3 x \right)} + \frac{3 \cos{\left(2 x \right)}}{9 x^{2} + 1}$$
Segunda derivada [src]
   /                       6*sin(2*x)   27*x*cos(2*x)\
-2*|2*atan(3*x)*cos(2*x) + ---------- + -------------|
   |                               2               2 |
   |                        1 + 9*x      /       2\  |
   \                                     \1 + 9*x /  /
$$- 2 \left(\frac{27 x \cos{\left(2 x \right)}}{\left(9 x^{2} + 1\right)^{2}} + 2 \cos{\left(2 x \right)} \operatorname{atan}{\left(3 x \right)} + \frac{6 \sin{\left(2 x \right)}}{9 x^{2} + 1}\right)$$
Tercera derivada [src]
  /                                          /          2  \                          \
  |                                          |      36*x   |                          |
  |                                       27*|-1 + --------|*cos(2*x)                 |
  |                                          |            2|                          |
  |  18*cos(2*x)                             \     1 + 9*x /            162*x*sin(2*x)|
2*|- ----------- + 4*atan(3*x)*sin(2*x) + --------------------------- + --------------|
  |           2                                             2                      2  |
  |    1 + 9*x                                    /       2\             /       2\   |
  \                                               \1 + 9*x /             \1 + 9*x /   /
$$2 \left(\frac{162 x \sin{\left(2 x \right)}}{\left(9 x^{2} + 1\right)^{2}} + 4 \sin{\left(2 x \right)} \operatorname{atan}{\left(3 x \right)} - \frac{18 \cos{\left(2 x \right)}}{9 x^{2} + 1} + \frac{27 \left(\frac{36 x^{2}}{9 x^{2} + 1} - 1\right) \cos{\left(2 x \right)}}{\left(9 x^{2} + 1\right)^{2}}\right)$$
Gráfico
Derivada de y=cos2x*arctg3x