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Derivative of x^2*(tan(4x+1))

Function f() - derivative -N order at the point
v

The graph:

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The solution

You have entered [src]
 2             
x *tan(4*x + 1)
$$x^{2} \tan{\left(4 x + 1 \right)}$$
x^2*tan(4*x + 1)
Detail solution
  1. Apply the product rule:

    ; to find :

    1. Apply the power rule: goes to

    ; to find :

    1. Rewrite the function to be differentiated:

    2. Apply the quotient rule, which is:

      and .

      To find :

      1. Let .

      2. The derivative of sine is cosine:

      3. Then, apply the chain rule. Multiply by :

        1. Differentiate term by term:

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

            1. Apply the power rule: goes to

            So, the result is:

          2. The derivative of the constant is zero.

          The result is:

        The result of the chain rule is:

      To find :

      1. Let .

      2. The derivative of cosine is negative sine:

      3. Then, apply the chain rule. Multiply by :

        1. Differentiate term by term:

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

            1. Apply the power rule: goes to

            So, the result is:

          2. The derivative of the constant is zero.

          The result is:

        The result of the chain rule is:

      Now plug in to the quotient rule:

    The result is:

  2. Now simplify:


The answer is:

The graph
The first derivative [src]
 2 /         2         \                   
x *\4 + 4*tan (4*x + 1)/ + 2*x*tan(4*x + 1)
$$x^{2} \left(4 \tan^{2}{\left(4 x + 1 \right)} + 4\right) + 2 x \tan{\left(4 x + 1 \right)}$$
The second derivative [src]
  /    /       2         \       2 /       2         \                            \
2*\8*x*\1 + tan (1 + 4*x)/ + 16*x *\1 + tan (1 + 4*x)/*tan(1 + 4*x) + tan(1 + 4*x)/
$$2 \left(16 x^{2} \left(\tan^{2}{\left(4 x + 1 \right)} + 1\right) \tan{\left(4 x + 1 \right)} + 8 x \left(\tan^{2}{\left(4 x + 1 \right)} + 1\right) + \tan{\left(4 x + 1 \right)}\right)$$
The third derivative [src]
  /         2                2 /       2         \ /         2         \        /       2         \             \
8*\3 + 3*tan (1 + 4*x) + 16*x *\1 + tan (1 + 4*x)/*\1 + 3*tan (1 + 4*x)/ + 24*x*\1 + tan (1 + 4*x)/*tan(1 + 4*x)/
$$8 \left(16 x^{2} \left(\tan^{2}{\left(4 x + 1 \right)} + 1\right) \left(3 \tan^{2}{\left(4 x + 1 \right)} + 1\right) + 24 x \left(\tan^{2}{\left(4 x + 1 \right)} + 1\right) \tan{\left(4 x + 1 \right)} + 3 \tan^{2}{\left(4 x + 1 \right)} + 3\right)$$