O and by the way this is for leisurely purposes so no rush
ok so where did I go wrong.. ...
so I first did this ...so then I seperated it to get
Then using substitution by power series I got
...then I went
...could someone point out my mistake...thanks
Best I can figure is that the function applies to the funciton directly to it's right, In this case, that means f(x) = x^2, and g(x) = mx^2 so this is cos f(g(x))
This may not be what the problem is, IDK, but since the OP doesn't include the answer, I figured it could be, since I've experienced similar frustration in the past.