Question

Помогите_____________________

Answer 1

$cfrac{3sina-5cosa+2}{sina+3cosa+6}=cfrac{1}{3}\\9sina-15cosa+6=sina+3cosa+6\8sina-18cosa=0|:8sina\1-frac{18}{8}ctg=0\frac{18}{8}ctg=1\ctg=frac{4}{9}$