DEXINST DC-1800N DEXINST SCIENTIFIC CALCULATOR DC-1800N SCIENTIFIC CALCULATOR 「520+13145 358035 1 f520+13145 13608035 SHIFT ALPHA SHIFT ALPHA MODE CLR ON nPr ab/e Roc( log X1 nCr Pol( d/e X3 nyp tan sin 10 cos ab/c er e X2 log RCL In ENG C sin (-) D cos 》月 E tan" hyp E sin cos INS STO tan RCL X DEL ENG Y M- M M+ INS DT LCL J 8 DEL 6 EXP r S-SUM T Ans r S-VAR T EXP Ans 可带入考场