1194     int deg360;  in isin()  local
1198         deg360 = (360 - ((- argDeg) % 360)) % 360;  in isin()
1200         deg360 = argDeg % 360;  in isin()
1202         deg360 = argDeg;  in isin()
1206     if (deg360 <= 90) {  in isin()
1207         return sintab[deg360];  in isin()
1208     } else if (deg360 <= 180) {  in isin()
1209         return sintab[180 - deg360];  in isin()
1210     } else if (deg360 <= 270) {  in isin()
1211         return -sintab[deg360 - 180];  in isin()
1213     return -sintab[360 - deg360];  in isin()