HP 33s Scientific manual Status of the Last X Register, 6User Memory and the Stack, € θ ,r

The Status of the LAST X Register

The following operations save x in the LAST X register:
+, –, ⋅ , ⎟	x , x2, 3 x , x3	ex, 10x
LN, LOG	yx, X y	I/x, INT÷, Rmdr
SIN, COS, TAN	ASIN, ACOS, ATAN
SINH, COSH, TANH	ASINH, ACOSH, ATANH	IP, FP, SGN, INTG,
		RND, ABS
%, %CHG	Σ+, Σ–	RCL+, –, ⋅, ⎟
y,x€θ,r	€HR, €HMS	€DEG, €RAD
θ,r€y, x
nCr	x!	CMPLX +/–
nPr
CMPLX +, –, ⋅ ,⎟	CMPLX ex, LN, yx,	CMPLX SIN, COS,
	1/x	TAN
€kg, €lb	€°C, €°F	€cm, €in
€l, €gal

Notice that /c does not affect the LAST X register.

The recall–arithmetic sequence x hÙvariable stores a different value in the LAST X register than the sequence x hvariable Ùdoes. The former stores x in LAST X; the latter stores the recalled number in LAST X.

B–6User Memory and the Stack