Question

Observe atentamente a figura abaixo: *

x=6 e y=12

x=√2 e y=6

x=12 e y=6

x=6√2 e y=6

x=6√3 e y=1

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Answer 1

$\boxed{\begin{array}{l}\sf cos(60^\circ)=\dfrac{4}{x}\\\sf\dfrac{1}{2}=\dfrac{4}{x}\\\sf x=2\cdot4\\\sf x=8\\\sf tg(60^\circ)=\dfrac{y}{4}\\\sf y=4tg(60^\circ)\\\sf y=4\sqrt{3}\\\sf corrija~o~gabarito\end{array}}$