Question

Determine as medidas de x e y dos seguintes triângulos.

Answer 1

y = 5raiz de 3
x = 5

Answer 2

Já que o triângulo é rectângulo, 

$\sin60^o=\frac{y}{10}\\\\\frac{\sqrt{3}}{2}=\frac{y}{10}\\\\2y=10\sqrt{3}\\\\\boxed{y=5\sqrt{3}}$

E,

$\cos60^o=\frac{x}{10}\\\\\frac{1}{2}=\frac{x}{10}\\\\2x=10\\\\\boxed{x=5}$