In this paper, we will discuss how to do the integral problem, the integral of cos 2x to x, using the basic integral formula. The basic integral formula used for working on $ \int cos (2x) \ dx $ is as follows.

$ \int cos (ax) \ dx = \frac{1}{a} sin (ax) + C $where: a coefficient of x.

Now from the given problem, the integral is cos (ax) to x having the value a = 2, so we get:

$ \begin{align} \int cos(2x) \ dx & = \frac{1}{2} sin (2x) + C \end{align}$

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