Area of 2016

Calculus Level 5

If the area bounded by the curve x 2 / 3 + y 2 / 3 = 201 6 2 / 3 x^{2/3} + y^{2/3} = 2016^{2/3} is the form of a × π a\times \pi , find a a .


The answer is 1524096.

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2 solutions

Otto Bretscher
Feb 16, 2016

We can parametrise the curve C C as x = 2016 cos 3 ( t ) , y = 2016 sin 3 ( t ) x=2016\cos^3(t),y=2016\sin^3(t) . Thus the enclosed area is C x d y \int_{C}xdy = 3 201 6 2 0 2 π cos 4 ( t ) sin 2 ( t ) d t = 3 201 6 2 π 8 =3*2016^2\int_{0}^{2\pi}\cos^4(t)\sin^2(t)dt=3*2016^2*\frac{\pi}{8} . The answer is 3 201 6 2 8 = 1524096 \frac{3*2016^2}{8}=\boxed{1524096}

Pulkit Gupta
Feb 16, 2016

The given equation represents an asteroid. Standard equation is given by x 2 3 + y 2 3 \large x^\frac{2}{3} + y^\frac{2}{3} = a 2 3 \large a^\frac{2}{3}

Its area is given by 3 a 2 8 π \large\frac{3a^2}{8} \pi .

Bhai tu kahan study karta haih?

Rishabh Deep Singh - 5 years, 4 months ago

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Bhai main school aur ghar main padhai karta hun.Aur koi sawal hai Bhai?

asad bhai - 5 years, 3 months ago

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