
198 Section 14: Numerical Integration
Since a value of θ will be
placed into the Y-register by
the f algorithm before it
executes this subroutine, the
- operation at this point
will calculate
(θ sin θ).
Calculate cos (θ – sin θ).
In Run mode, key the limits of integration into the X- and Y-registers. Be
sure that the trigonometric mode is set to Radians, then press ´f 1 to
J
1
(1).
Key lower limit into
Y-register.
Key upper limit into
X-register.
(If not already in
Radians mode.)
Example: Certain problems in
communications theory (for example, pulse
transmission through idealized networks)
require calculating an integral (sometimes
called the sine integral) of the form
.
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