Question

When a particle is projected at some angle to the
horizontal, it has a range R and time of flight t. If
the same particle is projected with the same speed
at some other angle to have the same range, its
time of flight is t, then
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Answer 1

There are 2 angles of projection for which the horizontal range is same for projectile. prove that the sum of the maximum heights for these two angles does not depend up on angle of projection. There are two angles of projection for which the horizontal range is same i.e. θ and 90o - θ.