(a)

The area of the region bounded by , , and .

Find the area of the region.

Area of the region is the sum of areas of the set of inscribed rectangle.

In the first case, the rectangle repeat at an interval of .

.

In the second graph, the rectangle repeat at an interval of .

.

(b)

The area of the region could be more accurate when there are more number

of rectangle.

More the number of rectangles, more accurate will be the area.

(a) Area of the region using rectangles in it is .

Area of the region using rectangles inscribed in it is .

(b) The area of the region could be more accurate when there are more number

of rectangles.