meka hadana thawa krama athi malli.meka api cls eke hadapu ganak.
1 hadena widiyata lawayata sin[(x-b)-(x-a)] kiyala liyagena mulu ekama sin (a-b) n bedanawa.
etapasse sin (a-b) anukalanayen eliyata ganna puluwanine.mokada eka niyathayakne.
eta passe athule kalla sulu karala cot widiyata...