Respostas

2014-04-20T19:12:36-03:00
X/sen45°=5/sen60°(lei dos senos)
x/(√2/2)=5/(√3/2)
x/√2=5/√3
x=5√2/√3
x=5√6/3

y²=4²+6²-2*4*6*cos60° (lei dos cossenos)
y²=16+36-24
y²=28
y=2√7