Using the method of integration find the area bounded by the cur

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 Multiple Choice QuestionsLong Answer Type

31. Find the area of the region enclosed by the parabola y2 = 4 a x and the line y = mx.
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32.

Find the area bounded by the curve  y = x2 and the line y = x.
OR
Find the area of the region {(x. y): x2 ≤ y ≤ x}.

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33. Using the method of integration find the area bounded by the curve |x| + |y| = 1.
[Hint: The required region is bounded by lines x + y = 1, x– y = 1, – x + y = 1 and
– x – y = 1].



The given curve is
|x| + |y| = 1
or ± x ± y = 1
The given equation represents four lines
x + y = 1, x - y = 1,
- x + y = 1 and -x - y = 1
which enclose a square of diagonal 2 units length.
 

Required area is symmetrical in all the four quadrants.
∴     required area = 4 (area OAB)
equals space 4 space integral subscript 0 superscript 1 left parenthesis 1 minus straight x right parenthesis space dx space equals space 4 space open square brackets straight x minus straight x squared over 2 close square brackets subscript 0 superscript 1 space equals space 4 open square brackets open parentheses 1 minus 1 half close parentheses minus left parenthesis 0 minus 0 right parenthesis close square brackets
equals space 4 space cross times space 1 half space equals space 2 space sq. space units. space

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34.

Find the area of the region bounded by the line y = 3 x + 2, the x-axis and the ordinates x = - 1 and x = 1.

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35. Find the area of the region included between the parabola straight y space equals 3 over 4 straight x squared space and space the space line space 3 straight x space minus space 2 straight y space plus space 12 space equals space 0
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36. Find the area bounded by the parabola x2 = 4 y and the straight line x = 4 y - 2.
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37. Find the area of the region included between the parabola y2 = x and the line x + y = 2.
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38.

Find the area of the region enclosed by the parabola x2 = y, the line y = x + 2 and the x-axis.
OR
Draw the rough sketch and find the area of the region:
{(x, y): x2 < y < x + 2}

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 Multiple Choice QuestionsShort Answer Type

39.

Draw a rough sketch of the curves y = sin x and y = cos x as x varies from 0 to straight pi over 2 and find the area of the region enclosed by them and the x-axis.

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40.

Find the area bounded by the curve y = cos x between x = 0 and x = 2 straight pi.

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