Question

qual o valor de x??????

Answer 1

Iremos usar o seno, em que $sen(x)=\frac{cateto\hspace{2}oposto}{hipotenusa}$.

R: $sen(30\°)=\frac{x}{12}\\\frac{1}{2}=\frac{x}{12}\\2x=12\\x=\frac{12}{2}\\x=6$