I used the following formulas, but got WA. Why?

 t3 = tan(a2);
 t5 = tan(a1);
 t6 = r2*t5;
 t12 = r1*r1;
 t16 = r1*r2;
 t21 = t5*t5;
 t23 = t3*t3;
 t29 = r2*r2;
 t41 = t12 + 2.0*t12*t5*t3 + 2.0*t16 - 4.0*t16*t5*t3 + t12*t21*t23 + 2.0*r1*t21*t23*r2 + t29 + 2.0*t29*t5*t3 + t29*t21*t23 + 4.0*r1*t23*r2 + 4.0*r2*t21*r1;
 t42 = sqrt(t41);
 t46 = atan(1/(r1*t3+t6)*(-r1+r1*t5*t3-r2+t6*t3+t42)/2.0);
 Test(t46);

 t46 = atan(1/(r1*t3+t6)*(-r1+r1*t5*t3-r2+t6*t3-t42)/2.0);
 Test(t46);

Edited by author 29.05.2004 00:49