A particle is projected from a point O w...

A particle is projected from a point O with an initial speed of `30 ms^(-1)` to pass through a point which is `40 m` from O horizontally and `10 m` above O. There are two angles of projection for which this is possible. These angles are `alpha` and `beta`. The value of `|tan (alpha+beta)|` is

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A particle is projected from a point O with an initial speed of `30 ms^(-1)` to pass through a point which is `40 m` from O horizontally and `10 m` above O. There are two angles of projection for which this is possible. These angles are `alpha` and `beta`. The value of `|tan (alpha+beta)|` is

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