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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08-03-2017
Mathematics

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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 · Answer 1 · 2017-03-08T23:14:13+01:00

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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