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Posted by on Tuesday, April 29, 2014 at 11:51pm.

An observer (0) spots a plane flying at a 55 degree 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 (0)

  • Trigonometry - , Wednesday, April 30, 2014 at 6:04am

    21/x = sin 55°

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