Respostas AVA

MATEMÁTICA III

Sabendo que senx = -3/5 e cosx = 4/5, então:

$\displaystyle\frac{{{3}\pi}}{{2}}<{x}<{2}\pi$ e secx = 5/4.
$\displaystyle{0}<{x}<\pi$ e tgx = 1.
$\displaystyle\frac{\pi}{{2}}<{x}<\pi$ e tgx = -3/4.
$\displaystyle{0}<{x}<\frac{\pi}{{2}}$ e cotgx = -4/3 .
$\displaystyle\pi<{x}<\frac{{{3}\pi}}{{2}}$ e cossecx = -5/3.