Question

calcule o valor de y em cada figura​

Answer 1

$\boxed{\begin{array}{l}\tt d)~\sf sen(y)=\dfrac{13}{26}\\\sf sen(y)=\dfrac{1}{2}\\\sf sen(y)=sen(30^\circ)\\\sf y=30^\circ\\\tt e)~\sf sen(60^\circ)=\dfrac{w}{18}\\\sf\dfrac{\sqrt{3}}{2}=\dfrac{w}{18}\\\sf 2w=18\sqrt{3}\\\sf w=\dfrac{18\sqrt{3}}{2}\\\sf w=9\sqrt{3}\\\tt f)~\sf cos(45^\circ)=\dfrac{20}{z}\\\sf\dfrac{\sqrt{2}}{2}=\dfrac{20}{z}\\\sf\sqrt{2}z=40\\\sf z=\dfrac{40}{\sqrt{2}}\\\sf z=\dfrac{40\sqrt{2}}{2}\\\sf z=20\sqrt{2}\end{array}}$