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A boy throws a ball at an angle theta wi...

A boy throws a ball at an angle `theta` with the vertical. If the vertical component of the initial velocity is `20ms^(-1)` and the wind imparts a horizontal acceleration of `8ms^(-2)` to the left, the angle at which the ball must be thrown so that the ball returns to the boy's hand is `theta`. What is the value of `10(tan theta)`

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