Question

Cho \(\int\limits^{\pi}_0\sin xdx=2\). Tính \(\int\limits^{\pi}_0\sin xdx\).

Answer 1

\(\int\limits_0^\pi {\frac{4}{3}\sin xdx} = \frac{4}{3}\int\limits_0^\pi {\sin xdx} = \frac{4}{3}.2 = \frac{8}{3}\).