Find the length of side DE to 1 decimal place.
D
42°
E
F
12
![Find the length of side DE to 1 decimal place D 42 E F 12 class=](https://us-static.z-dn.net/files/d8a/4dd8a2323b4f5aa9824458c3c9727f46.png)
Answer:
16.1
Step-by-step explanation:
Using Trigonometric ratio,
Cos E = adjacent / hypotenus
Cos 42° = 12/DE
DE = 12/ Cos 42°
DE = 16.1