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
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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.
