## [SOLVED] Error approximation - definite integrals

Can someone please show me in simple terms what I am supposed to be doing to find the error estimate?

$\int\limits^{\pi}_{0} 8sinxdx$

For trapezoidal $T_{10}$ I got 15.868188, which is the correct answer, but I need help doing the error estimate.

Also need help with midpoint and Simpson's too!