HP 40gs User Manual
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.
x
x 2
+
(
) x 3
+
(
)
⋅
⋅
1
+
x 2
+
(
) x 3
+
(
)
⋅
⋅
i x
⋅
(
)
exp
1
i x
⋅
(
)
exp
-----------------------
–
2 i
⋅
----------------------------------------------------
hp40g+.book Page 29 Friday, December 9, 2005 1:03 AM