ID=,dd +(I)  1Courier New1Symbol New1Courier New1Courier NewTimes New RomanTimes New Roman1Courier New1Courier New1Courier New1Courier New PS PS PS PS?/ <```@@@?~~~~~ԱޱޱԱ޿޿ph (((Pdd} d< p {2@@XeYeXeYe@???@@@@@@033333??@^ߛOw?HzG???lH@ܿQy@@?@ @@@}z?@@@@@@@@@@@@2??h!@$$$Xy@???????t u$v(w,x0y4z4п?hKB襰 h+acos(t) k+asin(t)9(x,y) = (h+acos(t),k+asin(t)); 0.000000 <= t <= 6.2831902S2S2???$$$- @:@????????- @:@KʰHɰ4p8qhٱ h+acos(p) k+asin(p)pi/4(x,y) = (h+acos(p),k+asin(p))2???$$$????????????űƱDZڱ۱ܱݱshkpi/4(x,y) = (h,k)2???$$$??- @:@?????? $(48<@<8hk h+acos(p) k+asin(p)!seg (h,k)--(h+acos(p),k+asin(p))2 2??@$$$@???????@ !"$%TQv