[KinG of KinGs]

المشاركة الأصلية كتبت بواسطة Obama08 [align=center]بسم الله الرحمن الرحيم we should find the time : 19.85*t - 4.33t^2 = 0 , t = 4.58 sec x=33cos(65-28) *t - .5*g* sin28*t^2 , x=71.75m [/align] [align=center]:fantastic_new:[/align]

please obama 08 explane from where the sin28 it came in the equation xf = xi+vxit-.5axt^2.

in short , why are you write sin28.