Logarithmic Hyperbolicfunctions - HP -11C Owner's Handbook Manual

48 Section 3: Numeric Functions
Logarithmic Functions
Natural Logarithm. Pressing calculates the natural
logarithm of the number in the displayed X-register, that is, the
logarithm to the base e (2.718281828) of the number in the
displayed X-register.
Natural Antilogarithm. Pressing calculates the natural
antilogarithm of the number in the displayed X-register, that is, it
raises e (2.718281828) to the power of the value in the X-register.
Common Logarithm. Pressing (9] calculates the common
logarithm of the number in the displayed X-register, that is, the
logarithm to the base 10.
Common Antilogarithm.. Pressing calculates the common
antilogarithm of the number in the displayed X-register, that is, it
raises 10 to the power of that number.
To C Example )
o Calculate Keystrokes Display
Natural Log 45 45
3.8067
Natural Antilog 3.4012 3.4012
30.0001
Common Log 12.4578 12.4578
1.0954
Common Antilog 3.1354 3.1354
1,365.8405
Hyperbolic Functions
Pressing Calculates
Hyperbolic sine (sinh)
(g](HYP"][SIN] Inverse hyperbolic sine (sinh™')
Hyperbolic cosine (cosh)