mathematics - trigonometry

An air traffic controller is in a control tower 92 m above the ground. He
estimates his angle of elevation to a passing airplane to be 17o. The
airplane is approximately 4800 m from the control tower.
Approximately how high is the airplane above the ground?

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  1. If the distance along the hypotenuse is 4800
    then h = 92 + 4800 / sin 17

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