Question

4) Encontre x e y
A)

Answer 1

Pelas razões trigonométricas, temos que:

$\sin45^\circ=\frac{y}{20\sqrt{2}}$

$\frac{\sqrt{2}}{2}=\frac{y}{20\sqrt{2}}$

$2y=\sqrt{2}\cdot20\sqrt{2}$

$y=20$

No caso de $x$, ficamos com:

$\cos45^\circ=\frac{x}{20\sqrt{2}}$

$\frac{\sqrt{2}}{2}=\frac{x}{20\sqrt{2}}$

$2x=\sqrt{2}\cdot20\sqrt{2}$

$x=20$