Question

Calcule o valor de x

Answer 1

sen 30°=x/30
   1/2=x/30
2x=1x30
2x=30
x=30/2
x=15

Answer 2

$Sen \ \alpha \ \dfrac{Cateto \ oposto \ ao \ angulo \ \alpha }{Medida \ da\ hipotenusa}$

$Sen \ 30^o = \dfrac{1}{2}$

==

$\dfrac{1}{2} = \dfrac{x}{30} \\ \\ \\ 2x = 30 . 1 \\ \\ 2x = 30 \\ \\ x = \dfrac{30}{2} \\ \\=\ \textgreater \ x = 15$