Question: At what angle above the horizontal should a projectile be fired so that its range ( x - displacement magnitude ) is SEVEN times the

At what angle above the horizontal should a projectile be fired so that its range (x-displacement magnitude) is SEVEN times the maximum height of its trajectory? Assume the projectile ends up at the same altitude it was fired from. Ignore air drag.
At what angle above the horizontal should a projectile be fired

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