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Question

If the angle of
projection is double the angle of inclination (`alpha`) of the plane on which
particle is projected, the ratio of times of fligh up the inclined plane
and down the inclined plane, will be


Options:
A .  `(1)/(2cos alpha)`
B .  `(1)/(2sin alpha)`
C .  `(1)/(2tan alpha)`
D .  `2cos alpha`
Answer: Option A



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