Question

Решите неравенство а)cost > 1/2 б)sint=< 1/2

Answer 1

$a);cost textgreater frac{1}{2}\t in (-frac{pi}{3}+2pi n; frac{pi}{3}+2pi n), ; nin Z;\ \b); sint leq frac{1}{2}\tin [-frac{7pi}{6}+2pi n;frac{pi}{6}+2pi n], ; nin Z.$