**Derivative Of Cos 2x**

### Find the derivative of y = cos (2x) of 40.

Now we know that every fourth derivative is kos (x) kas (x). If you don't know, you can watch it four times to see it:

1 .: sin (x)

2 .: Cass (X)

3 .: Sin (x)

4 .: Cass (X)

Since 40 has more than one derivative of 4, it has the form (x). With each derivative, we get the product of the series rule 2. Since we have 40 derivatives, our product is 2 2 40, so Kos (2x) = (2 40) Kos (2x) is 40 derivatives.

Derived from Cos 2x