HP -11C Owner's Handbook Manual page 26

48 Section 3: Numeric Functions
Logarithmic Functions
Natural Logarithm. Pressing (9) 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 [e*] 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] [LOG] calculates the common
logarithm of the number in the displayed X-register, that is, the
logarithm to the base 10.
Common Antilogarithm.. Pressing [10°] calculates the common
antilogarithm of the number in the displayed X-register, that is, it
raises 10 to the power of that number.
Example
To Calculate Keystrokes Display
Natural Log 45 45
(sj (tN) 3.8067
Natural Antilog 3.4012 3.4012
[e* 30.0001
Common Log 12.4578 12.4578
(g){toc 1.0954
Common Antilog 3.1354 3.1354
10) 1,365.8405
Hyperbolic Functions
Calculates
Pressing
((HyP)(siN)
(9 )(HYP")(SIN
()[HYP)[cos
Hyperbolic sine (sinh)
Inverse hyperbolic sine (sinh ')
Hyperbolic cosine (cosh)
Section 3: Numeric Functions 49
Pressing Calculates
(se) (RYP") (Cos Inverse hyperbolic cosine (cosh"')
((KYP)(TAN
Hyperbolic tangent (tanh)
(o) (HYP) (TAN) Inverse hyperbolic tangent {tant'')
aes Example sale 7]
| To Calculate Keystrokes Display
AW hyperbolic functions; "|
for example:
Hyperbolic sine 2.53 2.53
| ([RYP)(SIN) 6.2369
Inverse hyperbolic sine 1.95 1.95 | EIEW| 1.4210
Two-Number Functions
Exponential
Pressing [*] raises the number in the Y-register to the power of the
number in the X-register.
r
To Calculate | sea Display
Exponential 2 (ENTER 2.0000
3 3
8.0000
Percentages
Percent. To find a specified percentage of a number:
1. Key in the base number.
2. Press [ENTER].
3. Key in the percent rate.
4. Press (9 )[%).