sandracandanosa sandracandanosa
  • 08-03-2017
  • Mathematics
contestada

The angle of depression from D to F measures 40°. If DE = 100 m, find DF. Round your answer to the nearest tenth.

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dmarks13 dmarks13
  • 08-03-2017
You need to draw the triangle DEF with a right angle at E.  Angle D = 40 and DE = 100 m.  Once you have marked up your triangle, you can use cosine to find DF.  
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