Respostas

  • Ind
  • Ambicioso
2013-12-07T21:45:50-02:00
Boa noite :)  
Seno =  \frac{oposto}{hipotenusa}

sen 30° =  \frac{y}{12}

 \frac{1}{2}  = \frac{y}{12}

y =  \frac{12}{2}

y = 6