What is the opposite and reciprocal of pi-3?

The opposite is what makes ##0## when added
The reciprocal is what makes ##1## when multiplied

Opposite:
Usually you ‘flip’ the signs:
##-pi+3## because ##(pi-3)+(-pi+3)=0##
Reciprocal:
Usually you make numerator and denominator change places.
(Think of ##pi-3## as ##(pi-3)/1##)
Then the reciprocal will be:
##1/(pi-3)## because ##(pi-3)/1*1/(pi-3)=1##

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