Area of the region {(x, y): x^2+(y-2)^2 leq 4 | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The region is bounded by the circle $x^2 + (y-2)^2 = 4$ (center $(0, 2)$,radius $2$) and the parabola $x^2 = 2y$ (vertex $(0, 0)$ opening upwards)

Vedclass · Accepted Answer

$2\pi + \frac{16}{3}$

Vedclass · Answer

(D) The region is bounded by the circle $x^2 + (y-2)^2 = 4$ (center $(0, 2)$,radius $2$) and the parabola $x^2 = 2y$ (vertex $(0, 0)$ opening upwards).To find the intersection points,substitute $x^2 = 2y$ into the circle equation:$2y + (y-2)^2 = 4$$2y + y^2 - 4y + 4 = 4$$y^2 - 2y = 0 \implies y(y-2) = 0$So,$y = 0$ or $y = 2$.For $y = 2$,$x^2 = 4 \implies x = \pm 2$. The intersection points are $(2, 2)$ and $(-2, 2)$.The area is given by the integral of the upper curve minus the lower curve between $x = -2$ and $x = 2$.Area $= \int_{-2}^{2} [(\sqrt{4 - x^2} + 2) - \frac{x^2}{2}] dx$$= 2 \int_{0}^{2} (\sqrt{2^2 - x^2} + 2 - \frac{x^2}{2}) dx$$= 2 [(\frac{x}{2}\sqrt{4-x^2} + \frac{4}{2}\sin^{-1}(\frac{x}{2})) + 2x - \frac{x^3}{6}]_0^2$$= 2 [(0 + 2\sin^{-1}(1)) + 4 - \frac{8}{6}]$$= 2 [2(\frac{\pi}{2}) + 4 - \frac{4}{3}]$$= 2 [\pi + \frac{8}{3}] = 2\pi + \frac{16}{3}$.

Area of the region $\{(x, y): x^2+(y-2)^2 \leq 4, x^2 \geq 2y\}$ is

Similar Questions

The area in the first quadrant between the ellipses $x^{2} + 2y^{2} = a^{2}$ and $2x^{2} + y^{2} = a^{2}$ is:

The positive values of the parameter $a$ for which the area of the figure bounded by the curve $y = \cos ax$,$y = 0$,$x = \frac{\pi}{6a}$,and $x = \frac{5\pi}{6a}$ is greater than $3$ are:

The parabolas $y^2 = 4x$ and $x^2 = 4y$ divide the square region bounded by the lines $x = 4$,$y = 4$ and the coordinate axes. If $S_1, S_2, S_3$ are respectively the areas of these parts numbered from top to bottom,then $S_1:S_2:S_3$ is

Area of the region bounded by the curves $y = \sin x$ and $y = x$ between the lines $x = 0$ and $x = 2\pi$ is:

The area (in square units) of the region bounded by the parabola $y^2=4(x-2)$ and the line $y=2x-8$ is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module