Two projectiles are fired from the same point with the same

Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively. Which one of the following is true?

1. Their maximum height will be same
2. Their range will be same
3. Their landing velocity will be same
4. Their time of flight will be same

Given, u₁ = u₂ = u, θ₁ = 60° , θ₂ = 30°
In 1st case, we know that range

R₁ =	u² sin 2(60°)	=	u² sin 120°
	g		g

=	u² sin(90° + 30°)
	g

=	u² (cos 30°)	=	√3 u²
	g		2g

In 2nd case, when θ₂ = 30° , then

R₂ =	u² sin 60°	=	√3 u²	⇒ R₁ = R₂
	g		2g

[we get same value of ranges].