Question

Ache o valor de X e Y: 

Answer 1

a) cos18 ~= 0,95
    sen18 ~= 0,31
Cat.Adj/Hip = Cos --- x/10 = 0,95 => x~=9,5
Cat.Op/Hip = Sen --- y/10 = 0,31 =>  y~= 3,1

b)sen60 = $\sqrt{3}/2$
  cos60 = $1/2$

Cat.Adj/Hip = Cos -- b/a = $1/2$
Cat.Op/Hip = Sen -- $12 \sqrt{3}$/a = $\sqrt{3}/2$

$b/a = 1/2 \\ 12\sqrt{3} /a = \sqrt{3} /2 \\ \sqrt{3} a = 24\sqrt{3} \\ a = 24 \\ \\ b/24 = 1/2 \\ 2b = 24 \\ b =12$