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31 December, 12:01

A rocket fired straight up is tracked by an observer from the ground a mile away. (a) show that when the angle of elevation is theta, the height of the rocket in feet is h = 5280 tan theta.

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  1. 31 December, 12:52
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    Let the height of the rocket be x, then

    tan theta = h / 1 mile

    h = 1 tan theta miles

    But 1 mile = 5280 feets

    Therefore, the height in feet = 5280 tan theta.
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