Thursday, July 12, 2018

Integral of cos 2x

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}$

So how to do $ \int cos (2x) \ dx $, hopefully it can be useful for the asker and reader as well.


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