Question

what is 1- pi and -1 -pi ?

Answer 1

\(\large\color{blue}{ \ 1-π }\) and \(\large\color{blue}{ \ -1-π }\)

they are numbers,

it depends on the context of the problem. We don't know about it as much as you are.

Answer 2

if p(t) has the rectangular coordinates given in each of exercises 9-12 find (a) p(t- pi) (b) p(t-pi) (c) p(-t) (d) p(-t- pi)

11) (-1,0)