A Projectile is fired to hit a target which is in the same horizontal level as the point of projection. it falls 10 m short of the target when it is projected with angle of elevation of 75 degree and falls 10 m ahead of the target when it is projected with an angle of elevation of 45 degree .

Find correct angle of elevation of projection so that it exactly hits the target.

Details And Assumption

Assume Velocity of projection is same in each case

Take Acceleration due to gravity = 10 SI Units

If Your Answer is x degrees , Give value of sin(2x)

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