Phase Shift Keying $($PSK$)$

$($c$)$ BPSK

$S(t)=\{\begin{array}{c}Acos(2f_{c}t)*\end{array}$ binary $1$ Acos$(2tct+)=-$Acos$(2fct)$; binary $0$What is the corresponding $0$ and $1$ of this graf $?$