The time of flight of an object projected at an angle theta is T What will be it's time of flight, if the object be projected at an angle (90-theta)° ?
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Explanation:
Case 1 : Angle of projection is θ.
Time of flight T=g2usinθ ....(1)
where u is the speed of projection.
Case 2 : Angle of projection is 90o−θ.
Time of flight T=g2usin(90o−θ)=g2ucosθ ....(2)
Thus, ratio of time of flight T2T1=cosθsinθ
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