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Is This Integration?/하기웅

결국 ..
^^

(0 1/2까) (a^2 - x^2) 고~
x= cos t ~ (그 까??ㅋㅋ)

!! ..ㅋㅋ
.
(1/2 , (3)/2) ~
= + ~
게 구 고 그 .
(0,0) (1/2, (3)/2) 과 ((3)/2, 1/2)
/12 .
y=(3)x 과 y=(1/(3))x y=1/2과
* ((3)/2) / 2 (0,0) (1/2, (3)/2) 과 ((3)/2, 1/2)
.
고 구 .
~

~cpp
#include <iostream>
#include <cmath>
using namespace std;

#define pi 3.141592653589793238462643383279

double size;

int main()
{
	cout.setf(ios::fixed, ios::floatfield);    
    cout.setf(ios::showpoint);    
    cout.precision(3);

	while(cin>>size)
		cout << (pi/3 +1-sqrt(3.0))*size*size <<" "<< 2*(pi/6-2+sqrt(3.0))*size*size<<" "<<(4-(2.0/3)*pi-sqrt(3.0))*size*size<<endl;

	return 0;
}
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