Approximate $\displaystyle \int_0^{\pi/2} x\,\sin(x)dx$ by computing the Left and Right sums, using the partition $\lbrace 0,\pi/6,\pi/4,\pi/3,\pi/2 \rbrace$.

Your answers should be accurate to at least 4 decimal places.
Left Sum =

Right Sum =

You may include a formula as an answer.