HP 39g Graphing Calculator - Manual (Page 142)

Keyboard functions
GD'Q.
0
.[Z]
SHIFT e
Qn]
I shift IIO’*
i^,f^,rfANl
The most frequently used functions are available directly from
the keyboard. Many of the keyboard functions also accept
complex numbers as arguments.
Add, Subtract, Multiply, Divide. Also accepts complex
numbers, lists and matrices.
value I + value!, etc.
Natural exponential. Also accepts complex numbers.
value
Example
e''5 returns 148.413159103
Natural logarithm. Also accepts complex numbers.
liN(value)
Example
LN (1) returns 0
Exponential (antilogarithm). Also accepts complex numbers.
10''value
Example
10 3 returns 1000
Common logarithm. Also accepts complex numbers.
LOG(va/ite)
Example
LOG (100) returns 2
Sine, cosine, tangent. Inputs and outputs depend on the
current angle format (Degrees, Radians, or Grads).
SIN(va/Me)
COS(value)
TM}(value)
Example
TAN (45) returns 1 (Degrees mode).
10-4 Using mathematical functions