Question

help what am i doing wrong?
In triangle DEF, DE = 5 and m 10 years ago

Answer 1

i did 5*cos(55) = 2.867882182

Answer 2

|DE|=5|
|angle EDF|=55^o
|FE|=?
tan|\angle EDF|=\frac{|FE|}{|DE|}
tan55^o\approx1.4281
therefore:
frac{|FE|{5}\approx 1.4281\Rightarrow|FE|\approx 1.4281\times 5=7.1405\approx 7.1

Answer 3

oh ok thank u!

Answer 4

your welcome :)