Hp 48g Graphing Calculator Manuel d'utilisateur Page 269

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Example: An extension of the half-angle formula for sine is
sin(2z) = 2 sin(2) cos(z)
Create a transformation based on this formula and use it
to transform the expression ' SIN < 2* < K+1) ) ‘.
Step 1: Open the MATCH EXPRESSION form and enter the target
expression into the EXPR: field.
@fSYMBOLIC) (A] 0K
MHTC 0(M)2®S)0
(T) 1 (ENTER 1
EKPAESSiaN
EXPR: 'SIN(2*(X+n>
PATTERN:
REPLACEHENT:
_SURERPR FIRST CDND:
ENTER PATTERN TO SEARCH FOR
Step 2: Enter the pattern and replacement expressions, using a
wildcard for ^ in the formulais.
CD CIE) 2 ®
@Z iENTE~R) CD 2 ® fsilp
©qHHHE) ® z ® ®
CsMD ® (3 dUliD © z
(ENTER).
MATCH EXPRESSIONS^*
EXPR: 'SINC2*iX+l>) '
PATTERN: 'SIN<2*&Z>'
REPLACEMENT: ' 2*S IN <
gSUREXPR FIRST CDND:
SEARCH SUBEXPRESSIONS FIRST-?
_____
■HIliiBMHKIMiiaHMIiliRllHlISBi
20
Step 3: Leave .SUBEXPR FIRST unchecked and do not include a
conditional test. Execute the search-and-replace.
MANIPULATE EXPRESSION
EXPR:
ENTER EXPRESSION
_
_________________
HOTaHnrnHBiiBBiSimaMiigiijpiia
Calculus and Symbolic Manipulation 20-29
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