Homework Statement
Find ##R_4## for ##g(x)=cos(πx)## on ##[0,1]##
Homework EquationsThe Attempt at a Solution
(i) Since we want ##n=4## even sub intervals between ##x=0## and ##x=1##,
intervals are ##[0, \frac{π}{4}]##, ##[\frac{π}{4}, \frac{π}{2}]##, ##[\frac{π}{2}, \frac{3π}{4}]##...