Respostas

2014-06-06T14:57:51-03:00
A) hip = x
ca = 80
α = 70º

ca/hip = cos α
80/x = cos 70°
80/x = 0,34
0,34x = 80
x = 80/0,34
x = 235,29 m

b) co = x
co/ca = tg α
x/80 = tg 70°
x/80 = 2,75
x = 2,75.80
x = 219,80 m
1 5 1