adrianaa06 adrianaa06
  • 03-05-2021
  • Mathematics
contestada

will name brainliest

will name brainliest class=

Respuesta :

jimrgrant1 jimrgrant1
  • 03-05-2021

Answer:

DE ≈ 6.97

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos55° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{EF}{DE}[/tex] = [tex]\frac{4}{DE}[/tex] ( multiply both sides by DE )

DE × cos55° = 4 ( divide both sides by cos55° )

DE = [tex]\frac{4}{cos55}[/tex] ≈ 6.97 ( to the nearest hundredth )

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