Geometry- trig ratio

An observer (o) spots a plane flying at a 55 degrees angle to his horizontal line of sight. if the plane is flying at an altitude of 21,000 ft, what is the distance (x) from the plane (p) to the observer (o)?

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  1. sin 55 = 21,000/hypotenuse

    we want that hypotenuse

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  2. 25,636 ft?

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