Question

how many parts of substitution​

Answer 1

Answer:

Note that we have g(x) and its derivative g'(x) Like in this example:

Here f=cos, and we have g=x2 and its derivative 2x. This integral is good to go! When our integral is set up like that, we can do this substitution:

Then we can integrate f(u), and finish by putting g(x) back as u. Like this: Example: ∫cos(x2) 2x dx.