Answer:
5.3
Explanation:
For the given angle D, 4 is the adjacent leg.
The hypotenuse is DE.
The trigonometric ratio that relates the adjacent leg to the hypotenuse is the cosine ratio.
In general,
cos A = adj/hyp
In this case,
cos D = adj/hyp
cos 41° = DF/DE
cos 41° = 4/DE
(DE)(cos 41°) = 4
DE = 4/(cos 41°)
DE = 4/0.75470958 <----- value of cosine obtained from calculator
DE = 5.3