Example 6.3

Determine the value of the following integral:

$\int _0^\pi sin(x)dx$

Initialize variable x as a row vector, from 0 with increments of pi/100 to pi:
x=0:pi/100:pi;
Declare variable y as y=sin(x);
Issue the following command to calculate the ﬁrst area, the output will be as follows:

    area1=trapz(x,y)
area1 =
    1.9998

let us increase the increments as above:

    x=0:pi/1000:pi;
y=sin(x);
area2=trapz(x,y)

area2 =

    2.0000

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