Respostas

2014-05-05T20:42:33-03:00
Sen30º = b/8
1/2 = b/8
2b = 8
b = 8/2
b = 4
1 4 1
2014-05-05T20:47:56-03:00
Seno:0,5=x/8
x=8*0,5
x=4
*********** 
Cosseno:0,86=8/x
x=8/0,86
x=9,3
*********
Tan: 057=8/x
x=8/0,57
x=14
1 2 1
sen30º = b/8
1/2 = b/8
2b = 8
b = 8/2
b = 4