HP 35s User Manual page 137

Example: Bessel Function.
The Bessel function of the first kind of order 0 can be expressed as
Find the Bessel function for x–values of 2 and 3.
Enter the expression that defines the integrand's function:
Keys:
 
Ö 
() ()

X


ÕÕ



Now integrate this function with respect to t from zero to
Keys:
9
()
 


1
∫
J ( x ) cos(
0
0
cos (x sin t )
Display:
  
  



_



Display:


∫  _
x sin t ) dt
Description:
Clears memory.
Selects Equation mode.
Types the equation.
Terminates the expression and
displays its left end.
Checksum and length.
Leaves Equation mode.
; x = 2.
Description:
Selects Radians mode.
Enters the limits of integration
(lower limit first).
Displays the function.
Prompts for the variable of
integration.
Integrating Equations
8-3