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- <html>
- <head>
- </head>
- <body>
- <script type="text/javascript">
- var a=0,
- b=Math.PI/2,
- eps=0.0001,
- A=2,
- B=1,
- e=(A-B)/A;
- function f (x) {
- return Math.sqrt(1-e*e*Math.cos(x)*Math.cos(x));
- }
- var n=1,
- h=b-a,
- Sh=((f(a)+f(b))/2)*h;
- do {
- n=n*2;
- h=(b-a)/n;
- var Sh2=((f(a)+f(b))/2)*h;
- for (var i=1; i<n; i++) {
- Sh2+=f(a+i*h)*h;
- }
- if (Math.abs(Sh2-Sh)<=eps) {
- break;
- }
- Sh=Sh2;
- } while(1);
- document.write(Sh2);
- </script>
- </body>
- </html>
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