Estimate the area under the graph of

Question

f(x)=sin(pix) from x=0 to x=1 using the areas of 3 rectangles of equal width, with heights of the rectangles determined by the height of the curve a
a) left endpoint:
b) right endpoint:

Answer 1

A nice calculator for Riemann sums is at

http://mathworld.wolfram.com/RiemannSum.html