Evaluation of integrals, where limits are in radians?

Question

$$\int_0^1 2x \cdot \cos(x^2+2) \, dx$$

(Limits are in Radians) Could anyone point me in the right direction, thanks in advance.

Answer 1

\begin{align} & \int_0^1 2x\cos\left(x^2+2\right)\,dx\overset{u=x^2+2}{\longrightarrow} \left. \int_2^3 \cos(u)\,du=\sin(u)\right|_2^3 \\[10pt] = {} &\sin(3)-\sin(2)=2\cos\left(\frac{5}{2}\right) \sin\left(\frac{1}{2}\right)\approx -0.768 \end{align}