you have initial velocity in the y
and you have the acceleration
and you have the total time
vf = vi + at
then you find the final velocity in the x
and you put the vectors together to make the new direction, which you can use to get the angle
you have initial velocity in the y
and you have the acceleration
and you have the total time
vf = vi + at
then you find the final velocity in the x
and you put the vectors together to make the new direction, which you can use to get the angle