00:01
Hi there, in this question, the function is given as three times sine x, and the interval is 0 pi.
00:08
And what do we need? we need six intervals and left end.
00:16
Left end.
00:19
Okay, let me just draw the function here.
00:25
So at the x is equal to zero, the function has the value of 0 here, and x is equal to p again, it is 0.
00:31
So the function has something like this one.
00:34
So this is pi and this is zero.
00:37
So the width of the each rectangle, let me just write here, which is delta x, which is pi minus 0 divided by.
00:44
We need six intervals.
00:47
So that is equal to pi over six.
00:49
So that means 30, so x is equal 30 degrees.
00:57
So the first interval we have pi over six...