HP 15c Collector's Edition Owner's Handbook Manual page 214

202 Section 14: Numerical Integration
) )
Example:
Keystrokes
´ i
4
) )
´ f
1
®
i
2
f x
Display
1.8826 -03
3.1416
1.3825
1.7091 -05
J
00
00
i
4
i
i
4
i
f
4
4