Question

solve : 2 root 3cos A =SinA​

Answer 1

$2 \sqrt{3} cosa = sina \\ = > 2 \sqrt{3} = \frac{sina}{cosa} \\ = > 2 \sqrt{3} = tana \\ = > sina = \frac{2 \sqrt{3} }{ \sqrt{13} } \\ = > cosa = \frac{1}{ \sqrt{13} }$

hope it helps.