Convert to Scientific notation on TI-89

[soccerballtux]

Most of the equations I use I don't need/want engineering notation. It's a nuisance to change between Normal and Engineering 6x a day for different classes/homeworks. IE, I don't want eng/sci notation for complex conjugates, but it is helpful when solving equations involving some fraction of c.

I just get tired of counting all the zeros on a 9 digit number. Any suggestions?

 

[degibson]

Get another calculator: Leave one TI-89 in normal mode and the other in engineering.

 

[rage2050a]

format(ans(1), "e")
will print the value in engineering format like "12.345E3".

format(ans(1), "s")
will print the value in engineering format like "1.2345E4".

I have the "s" one in my custom menu by executing the program below.

:custmenu()
rgm
:
:Custom
:Title "Any"
: Item "format(ans(1),"&char(34)&"s"&char(34)&")"
:EndCustm
:
:EndPrgm