Question

resolva: senx = tanx, para x em[0,2r]

Answer 1

$sen(x)=tg(x)\\ \\sen(x)=\frac{sen(x)}{cos(x)}\\ \\sen(x).cos(x)=sen(x)\\ \\cos(x)=1\\ \\ S=\{x \in R /x=0 \ ou \ x=2\pi\}$