hp 49g+_user's guide_English_E_DCVL5300427_V2

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This indicates that the general expression for a derivative in the line editor or
in the stack is: ∫(lower_limit, upper_limit,integrand,variable_of_integration)
Press ` to return to the Equation Writer. The resulting screen is not the
definite integral we entered, however, but its symbolic value, namely,
To recover the derivative expression use ‚¯. To evaluate the derivative
again, you can use the D soft menu key. This shows again that
)cos()sin()sin(
0
τττ
τ
⋅−=⋅⋅
∫
dttt
Double integrals are also possible. For example,
which evaluates to 36. Partial evaluation is possible, for example:
This integral evaluates to 36.
Organizing data in the calculator
You can organize data in your calculator by storing variables in a directory
tree. To understand the calculator’s memory, we first take a look at the file
directory. Press the keystroke combination „¡ (first key in second row
of keys from the top of the keyboard) to get the calculator’s File Manager
screen: