S01
LBL
S
S62
RflD
503
RCL
X
504
SIN
505
RCL*
X
506
RTN
Now integrate this function with respect to x (that is, X) from zero to
2 (t = 2).
Keys:
ill
SOLVE//
{FN}
S
0I
ENTER
I2
Ml
SOLVE/f|
{XFN}X
Display:
2.
X=
1.6954
Description:
Selects
routine
S
for
the
function.
Enters
limits
of
inte
gration (lower
first).
Result for Si(2).
Accuracy
of
Integration
Since the calculator cannot compute
the
value
of
an integral exactly,it
approximates
it. The accuracy
of
this approximation depends on the
accuracy of the integrand's function itself, as calculated by your pro
gram.*
This is affected
by
round-off error in the calculator and the
accuracy of the empirical constants.
' Integrals of functions with certain characteristics such as spikes or very rapid oscillations
might
be calculated
inaccurately,
but the likelihood is very small.The generalcharacteristics
of functions that can causeproblems, as well as techniques fordealingwith them, aredis
cussed in appendix D.
8:
Numerical
Integration
131
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