Question

Calcule o valor de x e y e assinale a resposta correta:

a) X = 20 e Y = 20

b) X = 20 e Y = 10

c) X = 15 e Y = 20​

Answer 1

$\mathsf{cos(45^{\circ})=\dfrac{x}{20\sqrt{2}}}$

$\mathsf{\dfrac{\sqrt{2}}{2}=\dfrac{x}{20\sqrt{2}}}\\\mathsf{x=\dfrac{20\sqrt{2}.\sqrt{2}}{2}}$

$\mathsf{x=\dfrac{20.2}{2}}\\\large\boxed{\boxed{\boxed{\boxed{\mathsf{x=20}}}}}$

$\huge\boxed{\boxed{\boxed{\boxed{\mathsf{x=y=20}}}}}$