## problem in understandind sultion in numerical analisys..

A)
calculate $I=\int_{0}^{1}\cos(\frac{\pi}{2}x^2)$
by trapeze methos in those pannels
m=1,2,4,8
?

B)
what is the best aproximation we can get from part A of the question?

solution:
the solution for part A is
http://i47.tinypic.com/2vmh4b9.jpg

how they find $T_{2,1}$ for example??
how they find out that the best approximation is $T_{3,1}$