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ac了一道简单题，现在菜题越来越少了.

Posted by 2004huangyimin at 2007-08-16 22:37:39 on Problem 1254 
			k1 = tan((450 - arc1)*PI/180);
			k2 = tan((450 - arc2)*PI/180);

			a = (k1*x1 - k2*x2 - y1 + y2)/(k1 - k2);
			b = (k1*k2*(x1 - x2) + k1*y2 - k2*y1)/(k1 - k2);
			cout << fixed << setprecision(4)<<a<<" "<<b<<endl;
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