Question

Tính:

a) \(\int\limits^{\dfrac{\pi}{4}}_0\left(3\sin x-2\cos x\right)dx;\)

b) \(\int\limits^{\dfrac{\pi}{3}}_{\dfrac{\pi}{6}}\left(\dfrac{2}{\sin^2x}-\dfrac{3}{\cos^2x}\right)dx.\)