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QJEEM22Mabd0a: JEE Main 2022 Mathematics - Class 12 JEEM22Mabd0a Solution: The area of the region is equal to :

The area of the region

{(x,y):∣x−1∣≤y≤5−x2}\left\{(x, y):|x-1| \leq y \leq \sqrt{5-x^{2}}\right\} is equal to :

Multiple Choice Options

  • A 52sin⁡−1(35)−12\frac{5}{2} \sin ^{-1}\left(\frac{3}{5}\right)-\frac{1}{2}
  • B 5π4−32\frac{5 \pi}{4}-\frac{3}{2}
  • C 3π4+32\frac{3 \pi}{4}+\frac{3}{2}
  • D 5π4−12\frac{5 \pi}{4}-\frac{1}{2}

Step-by-Step Verified Solution

A=∫−11(5−x2−(1−x))dx+∫12(5−x2−(x−1))dxA = \int\limits_{ - 1}^1 {\left( {\sqrt {5 - {x^2}} - (1 - x)} \right)dx + \int\limits_1^2 {\left( {\sqrt {5 - {x^2}} - (x - 1)} \right)dx} }

JEE Main 2022 (Online) 29th July Morning Shift Mathematics - Area Under The Curves Question 59 English Explanation

A=2(x25−x2+52sin⁡−1x5)−2x∣01+x25−x2+52sin⁡−1x5−x22+x∣12\left. {A = 2\left( {{x \over 2}\sqrt {5 - {x^2}} + {5 \over 2}{{\sin }^{ - 1}}{x \over {\sqrt 5 }}} \right) - 2x} \right|_0^1 + \left. {{x \over 2}\sqrt {5 - {x^2}} + {5 \over 2}{{\sin }^{ - 1}}{x \over {\sqrt 5 }} - {{{x^2}} \over 2} + x} \right|_1^2

=(5π4−12)= \left( {{{5\pi } \over 4} - {1 \over 2}} \right) sq. units

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