Question

tg(-t) * cost - sin(4п-t) упростить выражние

Answer 1

tg(-t)*cos(t)-sin(4π-t)=

=-tg(t)*cos(t)-sin(t)=

=-(sin(t)/cos(t))*cos(t)-(-sin(t))=-sin(t)+sin(t)=0

Answer 2

$tg(-t)*cost-sin(4pi-t)=-tgt*cost+sint=</var><var>-frac{sint*cost}{cost}+sint=-sint+sint=0$