Logarithmic Functions; Hyperbolic Functions - HP -15C Owner's Handbook Manual

28 Section 2: Numeric Functions

Logarithmic Functions

Natural Logarithm. Pressing |Z calculates the natural logarithm of
the number in the display; that is, the logarithm to the base e.
Natural Antilogarithm. Pressing ' calculates the natural antilogarithm
of the number in the display; that is, raises e to the power of that number.
Common Logarithm. Pressing | o calculates the common
logarithm of the number in the display; that is, the logarithm to the base 10.
Common Antilogarithm.
antilogarithm of the number in the display; that is, raises 10 to the power of
that number.
Keystrokes
45 |Z
3.4012 '
12.4578 | o
3.1354 @

Hyperbolic Functions

Given x in the display (X-register):
Pressing
´P[
|H[
´P\
|H\
´P]
|H]
Pressing
Display
3.8067
30.0001
1.0954
1,365.8405
hyperbolic sine of x
inverse hyperbolic sine of x
hyperbolic cosine of x
inverse hyperbolic cosine of x
hyperbolic tangent of x
inverse hyperbolic tangent of x
@ calculates the common
Natural log of 45.
Natural antilog of 3.4012.
Common log of 12.4578.
Common antilog of
3.1354.
Calculates