Question

A projectile is projected at an angle 30° from horizontal has range R. If the angle of projection at the same initial velocity be 60°,then range will be

Answer 1

R = u^2 Sin(2x) / g

For same initial velocity R ∝ Sin(2x)
Sin(2 * 30) = Sin(2 * 60)
∴ R1 = R2

Range projectile will be again R.