Consider the following integral:
$$I(t)=\int_1^t\sin^2(f(x))dx$$
Here , $f(x)$ is monotonic for the given domain and is at least twice differentiable.
Is there a result (in its full generality) of following type exists :
$I(x)= g(x)+O(j(x))$
Such that , $j(x)$ is bounded and g(x) is monotonic .