Aprojectile's horizontal range on level ground is r=v20sin2θ/g. at what launch angle or angles will the projectile land at half of its maximum possible range. enter your answers numerically separated by commas. express your answer using two significant figures.

As given the formula of range is

now for the maximum range

now for half of this maximum range we will have

now from above we have

so two possible values for above is given as

so above two angle we will have half of maximum range

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement