`y10000`
Câu 16 :
$\text{sin}$ `= \frac{c.đối}{c.huyền}`
`=>` $sinC$ `= \frac{AC}{a}`
`=>` $sin30°$ `= \frac{AC}{6\sqrt{3}}`
`=>` $AC$ `= 6\sqrt{3} .` $\text{sin30°}$
`=>` $AC$ `= 6\sqrt{3} . \frac{1}{2}`
`=>` $AC$ `= 3\sqrt{3}`
$\text{hay b =}$ `3\sqrt{3}`
$\text{→ Chọn A}$