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y=log((sin^2)(4x))

Derivative of y=log((sin^2)(4x))

Function f() - derivative -N order at the point
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The solution

You have entered [src]
   /   2       \
log\sin (x)*4*x/
log(sin2(x)4x)\log{\left(\sin^{2}{\left(x \right)} 4 x \right)}
d /   /   2       \\
--\log\sin (x)*4*x//
dx                  
ddxlog(sin2(x)4x)\frac{d}{d x} \log{\left(\sin^{2}{\left(x \right)} 4 x \right)}
Detail solution
  1. Let u=sin2(x)4xu = \sin^{2}{\left(x \right)} 4 x.

  2. The derivative of log(u)\log{\left(u \right)} is 1u\frac{1}{u}.

  3. Then, apply the chain rule. Multiply by ddxsin2(x)4x\frac{d}{d x} \sin^{2}{\left(x \right)} 4 x:

    1. The derivative of a constant times a function is the constant times the derivative of the function.

      1. Apply the product rule:

        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)=xf{\left(x \right)} = x; to find ddxf(x)\frac{d}{d x} f{\left(x \right)}:

        1. Apply the power rule: xx goes to 11

        g(x)=sin2(x)g{\left(x \right)} = \sin^{2}{\left(x \right)}; to find ddxg(x)\frac{d}{d x} g{\left(x \right)}:

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

        2. Apply the power rule: u2u^{2} goes to 2u2 u

        3. Then, apply the chain rule. Multiply by ddxsin(x)\frac{d}{d x} \sin{\left(x \right)}:

          1. The derivative of sine is cosine:

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

          The result of the chain rule is:

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

        The result is: 2xsin(x)cos(x)+sin2(x)2 x \sin{\left(x \right)} \cos{\left(x \right)} + \sin^{2}{\left(x \right)}

      So, the result is: 8xsin(x)cos(x)+4sin2(x)8 x \sin{\left(x \right)} \cos{\left(x \right)} + 4 \sin^{2}{\left(x \right)}

    The result of the chain rule is:

    8xsin(x)cos(x)+4sin2(x)4xsin2(x)\frac{8 x \sin{\left(x \right)} \cos{\left(x \right)} + 4 \sin^{2}{\left(x \right)}}{4 x \sin^{2}{\left(x \right)}}

  4. Now simplify:

    2tan(x)+1x\frac{2}{\tan{\left(x \right)}} + \frac{1}{x}


The answer is:

2tan(x)+1x\frac{2}{\tan{\left(x \right)}} + \frac{1}{x}

The graph
02468-8-6-4-2-1010-500500
The first derivative [src]
     2                       
4*sin (x) + 8*x*cos(x)*sin(x)
-----------------------------
                2            
         4*x*sin (x)         
8xsin(x)cos(x)+4sin2(x)4xsin2(x)\frac{8 x \sin{\left(x \right)} \cos{\left(x \right)} + 4 \sin^{2}{\left(x \right)}}{4 x \sin^{2}{\left(x \right)}}
The second derivative [src]
                          /     2           2                     \                                 
  2*x*cos(x) + sin(x)   2*\x*cos (x) - x*sin (x) + 2*cos(x)*sin(x)/   2*(2*x*cos(x) + sin(x))*cos(x)
- ------------------- + ------------------------------------------- - ------------------------------
           x                               sin(x)                                 sin(x)            
----------------------------------------------------------------------------------------------------
                                              x*sin(x)                                              
2(2xcos(x)+sin(x))cos(x)sin(x)+2(xsin2(x)+xcos2(x)+2sin(x)cos(x))sin(x)2xcos(x)+sin(x)xxsin(x)\frac{- \frac{2 \cdot \left(2 x \cos{\left(x \right)} + \sin{\left(x \right)}\right) \cos{\left(x \right)}}{\sin{\left(x \right)}} + \frac{2 \left(- x \sin^{2}{\left(x \right)} + x \cos^{2}{\left(x \right)} + 2 \sin{\left(x \right)} \cos{\left(x \right)}\right)}{\sin{\left(x \right)}} - \frac{2 x \cos{\left(x \right)} + \sin{\left(x \right)}}{x}}{x \sin{\left(x \right)}}
The third derivative [src]
  /                             2           2                                         /     2           2                     \            /     2           2                     \        2                                                                   \
  |2*x*cos(x) + sin(x)   - 3*cos (x) + 3*sin (x) + 4*x*cos(x)*sin(x)                4*\x*cos (x) - x*sin (x) + 2*cos(x)*sin(x)/*cos(x)   2*\x*cos (x) - x*sin (x) + 2*cos(x)*sin(x)/   3*cos (x)*(2*x*cos(x) + sin(x))   2*(2*x*cos(x) + sin(x))*cos(x)         |
2*|------------------- - ------------------------------------------- + 2*x*cos(x) - -------------------------------------------------- - ------------------------------------------- + ------------------------------- + ------------------------------ + sin(x)|
  |          2                              sin(x)                                                          2                                              x*sin(x)                                   2                             x*sin(x)                    |
  \         x                                                                                            sin (x)                                                                                   sin (x)                                                      /
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                             x*sin(x)                                                                                                                            
2(2xcos(x)+3(2xcos(x)+sin(x))cos2(x)sin2(x)+sin(x)4(xsin2(x)+xcos2(x)+2sin(x)cos(x))cos(x)sin2(x)4xsin(x)cos(x)+3sin2(x)3cos2(x)sin(x)+2(2xcos(x)+sin(x))cos(x)xsin(x)2(xsin2(x)+xcos2(x)+2sin(x)cos(x))xsin(x)+2xcos(x)+sin(x)x2)xsin(x)\frac{2 \cdot \left(2 x \cos{\left(x \right)} + \frac{3 \cdot \left(2 x \cos{\left(x \right)} + \sin{\left(x \right)}\right) \cos^{2}{\left(x \right)}}{\sin^{2}{\left(x \right)}} + \sin{\left(x \right)} - \frac{4 \left(- x \sin^{2}{\left(x \right)} + x \cos^{2}{\left(x \right)} + 2 \sin{\left(x \right)} \cos{\left(x \right)}\right) \cos{\left(x \right)}}{\sin^{2}{\left(x \right)}} - \frac{4 x \sin{\left(x \right)} \cos{\left(x \right)} + 3 \sin^{2}{\left(x \right)} - 3 \cos^{2}{\left(x \right)}}{\sin{\left(x \right)}} + \frac{2 \cdot \left(2 x \cos{\left(x \right)} + \sin{\left(x \right)}\right) \cos{\left(x \right)}}{x \sin{\left(x \right)}} - \frac{2 \left(- x \sin^{2}{\left(x \right)} + x \cos^{2}{\left(x \right)} + 2 \sin{\left(x \right)} \cos{\left(x \right)}\right)}{x \sin{\left(x \right)}} + \frac{2 x \cos{\left(x \right)} + \sin{\left(x \right)}}{x^{2}}\right)}{x \sin{\left(x \right)}}
The graph
Derivative of y=log((sin^2)(4x))