HP49G Sysrpl help with recalling contents of pointers

Hi , I need some help me with recalling contents of ROM during runtime.

I wish to recall the contents of e.g. C%SIN (supported entry) to the stack
during runtime (in order to modify the composite ) and then use it.

E.g.

:: ' C%SIN recall? CDRCOMP EVAL ;

What would the magic word or procedure for recall? be on the hp49g?

I ask because
C%SIN decompiles to
:: PTR 0FEDA 2DUP %%COSH....;
Where PTR 0FEDA splits a C% (complex) into two extended reals.
In this case I already have two extended reals on the stack, and it would be
a waste of time and accuracy to make it a C% first.

Thanks on beforehand
Gjermund Skailand
PS in this particular case the below is a shorter version.
:: ' C%SIN recall? EvalNoCheck ;


.

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