Question

qual o valor de cos (-7 pi)? (com calculo)

Answer 1

Oie, Td Bom?!

$= \cos( - 7\pi)$

$= \cos(7\pi)$

$= \cos(\pi \: . \: 2 \: . \: 3\pi )$

$= \cos(\pi)$

$= - 1$

Att. Makaveli1996