HP 15c Collector's Edition Owner's Handbook Manual page 209

Note:
f
x
x
Example:
f θ θ
Keystrokes
| ¥
´ b
1
Section 14: Numerical Integration
_
v v v
J x
J
θ
Display
000-
001-42,21, 1
x
x
x
θ x θ dθ
θ θ dθ
197
f x
f
x
x
x