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NCERT Solutions for class 12 Maths | Chapter 8 - Application of Integrals

(1) Area of the region bounded by the curve y = cos x between x = 0 and x = π is
[A] 2 sq. units
[B] 4 sq, units
[C] 3 sq.units
[D] 1 sq. units
Answer: 2 sq. units
(2) The area of the region bounded by the circle x² + y² = 1 is
[A] 2π sq. units
[B] 7π sq. units
[C] 3π sq. units
[D] 4π sq. units
Answer: 7π sq. units

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(3) The area bounded by the lines y = |x| – 1 and y = -|x| + 1 is
[A] 1 sq. unit
[B] 2 sq. unit
[C] 2√2 sq. units
[D] 4 sq. units
Answer: 2 sq. unit
(4) The area bounded by the lines |x| + |y| = 1 is
[A] 1 sq. unit
[B] 2 sq. units
[C] 2√2 sq. units
[D] 4 sq. units
Answer: 2 sq. units
(5) Area bounded between the parabola y² = 4ax and its latus rectum is
[A] 1/3 a sq. units
[B] 1/3 a² sq. units
[C] 8/3 a sq. units
[D] 8/3 a² sq. units
Answer: 8/3 a² sq. units
(6) Area of the region in the first quadrant enclosed by the x-axis, the line y = x and the circle x² + y² = 32 is
[A] 16π sq.units
[B] 4π sq. units
[C] 32π sq. units
[D] 24π sq. units
Answer: 4π sq. units
(7) The area of the region bounded by the curve y = sin x between the ordinates x = 0, x = π/2 and the x-axis is
[A] 2 sq. units
[B] 4 sq. units
[C] 3 sq. units
[D] 1 sq, unit
Answer: 1 sq, unit
(8) The area of the region bounded by the curve x = 2y + 3 and the lines y = 1 and y = -1 is
[A] 4 sq. units
[B] 3/2 sq. units
[C] 6 sq. units
[D] 8 sq, units
Answer: 6 sq. units
(9) TArea bounded by the lines y = |x| – 2 and y = 1 – |x – 1| is equal to
[A] 4 sq. units
[B] 6 sq. units
[C] 2 sq. units
[D] 8 sq. units
Answer: 4 sq. units
(10) The area of the region bounded by the line y = | x – 2 |, x = 1, x = 3 and x-axis is
[A] 4 sq. units
[B] 2 sq, units
[C] 3 sq. units
[D] 1 sq. unit
Answer: 1 sq. unit
(11) The area bounded by the curve 2x² + y² = 2 is
[A] π sq. units
[B] √2π sq. units
[C] π/2 sq. units
[D] 2π sq. units
Answer: √2π sq. units
(12) Area of the ellipse 1 is
[A] 4π ab sq. units
[B] 2π ab sq. units
[C] π ab sq. units.
[D] πab/2 sq. units
Answer: π ab sq. units.
(13) The area of the region bounded by the curve x² = 4y and the straight line x = 4y – 2 is
[A] 3/8 sq.units
[B] 5/8 sq.units
[C] 7/8 sq.units
[D] 9/8 sq. units
Answer: 9/8 sq. units
(14) The area of the region bounded by the ellipse is
[A] 20π sq. units
[B] 20π² sq. units
[C] 16π² sq. units
[D] 25π sq. units
Answer: 20π sq. units
(15) The area of the region bounded by the and the lines x = 2 and x = 3
[A] 7/2 sq. unit
[B] 9/2 sq. unit
[C] 11/2 sq. units
[D] 13/2 sq. units
Answer: 7/2 sq. unit
(16) The area of the region bounded by parabola y² = x and the straight line 2y = x is
[A] 4/3 sq. unit
[B] 1 sq. unit
[C] 2/3 sq. units
[D] 1/3 sq. units
Answer: 4/3 sq. unit
(17) The area of the region bounded by the curve y = and x-axis is
[A] 8π sq.units
[B] 20π sq. units
[C] 16π sq. units
[D] 256π sq. units
Answer: 8π sq.units
(18) The area of the region bounded by the y-axis, y = cos x and y = sin x, 0 ≤ x ≤ π/2 is
[A] √2 sq.units
[B] (√2 + 1) sq. units
[C] (√2 – 1) sq. units
[D] (2√2 – 1) sq.units
Answer: (√2 – 1) sq. units
(19) If y = 2 sin x + sin 2x for 0 ≤ x ≤ 2π, then the area enclosed by the curve and x-axis is
[A] 9/2 sq. units
[B] 8 sq. units
[C] 12 sq. units
[D] 4 sq. unjts
Answer: 12 sq. units
(20) Tne area bounded by the curve y = x² – 1 and the straight line x + y = 3 is
[A] 9/2 sq. units
[B] 4 sq. units
[C] 7√17/6 sq. units
[D] 17√17/6 sq. units
Answer: 17√17/6 sq. units

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