/trig_xmarks {
gsave
save /SavedState exch def
setSymbol
(p) pi coeff_xmarks
SavedState restore
grestore
} def
/trig_ymarks {
gsave
save /SavedState exch def
setSymbol
(p) pi coeff_ymarks
SavedState restore
grestore
} def
/trig_marks {
dup trig_xmarks trig_ymarks
} def
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