[34S] Complex numbers

[Jeff O.]

(03-19-2014 10:13 PM)Tugdual Wrote:  To enter a complex value in the 15C you would do:
1. Real value
2. ENTER
3. Imaginary part
4. (f) I
So basically until step 4 you used 2 stack entries pretty much like the 34s.

There is a somewhat convoluted method to enter a complex value on the 15C stack without first using two stack levels. Useful in case you have something in Z that you want to keep for future use but need to enter a complex value. It goes something like this:
1. key in imaginary component
2. press f Re<>Im
3. press <-- (backarrow to clear x and disable stack lift)
4. key in real component
5. proceed with calculations

There is an even more convoluted method to accomplish the same thing on the 42s.