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function ROTx(x,y,A) {AA = A*Math.PI/180; return x*Math.cos(AA)-y*Math.sin(AA)} function ROTy(x,y,A) {AA = A*Math.PI/180; return x*Math.sin(AA)+y*Math.cos(AA)} aX = -8; bX = 2; aY = 0; bY = 10 Dx = 1; Dy = 1 C1="black" function XX1(t) {x=t; if(Ix(x)<1){x=1/0}; return x} function YY1(t) {y=t*t; if(Ix(x)<1){x=1/0}; return y}; t1=-8; t2=8 for(j=0;j<=5e3;j=j+1) {t=t1+(t2-t1)/5e3*(j-1);L1x[j]=XX1(t);L1y[j]=YY1(t)} C2="blue" A=30; for(j=0;j<=5e3;j=j+1) { t=t1+(t2-t1)/5e3*(j-1); L2x[j]=ROTx(t,t*t,A)-4; L2y[j]=ROTy(t,t*t,A)+2 } C3="green" A=60; for(j=0;j<=5e3;j=j+1) { t=t1+(t2-t1)/5e3*(j-1); L3x[j]=(ROTx(t,t*t,A)-2)*1.5; L3y[j]=(ROTy(t,t*t,A)+2)*2.5 }