If the terminal point determined by $\displaystyle {t}$ is $\displaystyle {P}{\left({a},{b}\right)}$, then
(a) the terminal point $\displaystyle {P}{\left({x},{y}\right)}$ determined by $\displaystyle \pi-{t}$ is
$\displaystyle {x}=$ and $\displaystyle {y}=$ ;
(b) the terminal point $\displaystyle {P}{\left({x},{y}\right)}$ determined by $\displaystyle -{t}$ is
$\displaystyle {x}=$ and $\displaystyle {y}=$ ;
(c) the terminal point $\displaystyle {P}{\left({x},{y}\right)}$ determined by $\displaystyle \pi+{t}$ is
$\displaystyle {x}=$ and $\displaystyle {y}=$ ;
(d) the terminal point $\displaystyle {P}{\left({x},{y}\right)}$ determined by $\displaystyle {2}\pi+{t}$ is
$\displaystyle {x}=$ and $\displaystyle {y}=$ ;