HP 40gs - Page 211

Computer Algebra System (CAS) 14-29
Typing:
DISTRIB((X+1)·(X+2)·(X+3))
gives:
EPSX0 Disregard small values
EPSX0 has as a parameter an expression in X, and returns
the same expression with the values less than EPS
replaced by zeroes.
Typing:
EPSX0(0.001 + X)
gives, if EPS=0.01:
0 + x
or, if EPS=0.0001:
.001 + x
EXPLN Transform a trigonometric expression into complex
exponentials
EXPLN takes as an argument a trigonometric expression.
It transforms the trigonometric function into exponentials
and logarithms without linearizing it.
EXPLN puts the calculator into complex mode.
Typing:
EXPLN(SIN(X))
gives:
EXP2POW Transform exp(n∗ln(x)) as a power of x
EXP2POW transforms an expression of the form
exp(n × ln(x)), rewriting it as a power of x.
xx2+()x 3+()⋅⋅ 1+ x 2+()x 3+()⋅⋅
ix⋅()exp
1
ix⋅()exp
-----------------------
–
2 i⋅
-
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hp40g+.book Page 29 Friday, December 9, 2005 12:27 AM