HP 9g Graphing Calculator - Manual (Page 34)

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[ SAVE ] [ B ] [ ]
1 (3) Add 3 to variable B
[ ALPHA ] [ B ]
[ + ] 3 [ ]
2 (4) Clear all variables
[ 2nd ] [ CL-VAR ] [ 2nd ]
[ RCL ]
Example 6
(1) Set PROG 1 = cos (3A) + sin (5B), where A = 0, B = 0
[ cos ] 3 [ ALPHA ] [ A ] [ ]
[ + ] [ sin ] 5 [ ALPHA ] [ B ]
[ ]
[ SAVE ] [ PROG ] 1
[ ]
3 (2) Set A = 20,B = 18, get PROG 1 = cos (3A) + sin (5B) = 1.5