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cos(3*x)^(2)

Derivative of cos(3*x)^(2)

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

The graph:

from to

Piecewise:

The solution

You have entered [src]
   2     
cos (3*x)
$$\cos^{2}{\left(3 x \right)}$$
cos(3*x)^2
Detail solution
  1. Let .

  2. Apply the power rule: goes to

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

    1. Let .

    2. The derivative of cosine is negative sine:

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

      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:

      The result of the chain rule is:

    The result of the chain rule is:

  4. Now simplify:


The answer is:

The graph
The first derivative [src]
-6*cos(3*x)*sin(3*x)
$$- 6 \sin{\left(3 x \right)} \cos{\left(3 x \right)}$$
The second derivative [src]
   /   2           2     \
18*\sin (3*x) - cos (3*x)/
$$18 \left(\sin^{2}{\left(3 x \right)} - \cos^{2}{\left(3 x \right)}\right)$$
The third derivative [src]
216*cos(3*x)*sin(3*x)
$$216 \sin{\left(3 x \right)} \cos{\left(3 x \right)}$$
The graph
Derivative of cos(3*x)^(2)