Question about Texas Instruments TI-86 Calculator

# What button do you push on the TI-86 calculator to do the inv log function?

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For the inverse natural log, press 2nd LN. For the inverse common log, press 2nd LOG.

For example, to calculate the inverse natural log of 2, press 2nd LN 2 ENTER and you'll get about 7.389 .

Posted on Jan 25, 2011

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## Related Questions:

### How to calculate inv logs on casio fx-82 au plus?

The inverse of log functions are power functions.
Inv of ln is exponential (e^x)
A function and its inverse usually share the same physical key. One function is accessed directly, the other by using the SHIFT or 2ndF key.

Aug 18, 2014 | Casio Office Equipment & Supplies

### How do I calculate inverse logs on casio fx-82au plus?

The inverse of log functions are power functions.
Inv of ln is exponential (e^x)
A function and its inverse usually share the same physical key. One function is accessed directly, the other by using the SHIFT or 2ndF key.

Aug 18, 2014 | Casio Office Equipment & Supplies

### Change base log

The TI 86 has two logarithmic functions: natural logarithm (ln) and common (decimal) logarithms (log). If you need the logarithm in any other base than e or 10 you need to use one of the two equivalent expressions
log_b(x) =ln(x)/ln(b) =log(x)/log(b)
Here b is the value of the base of the logarithm and x is the argument (the value whose logarithm you are seeking). Of course the argument x must be a positive number.
Note: On the TI 86 the log function can calculate the logarithm of a complex number, according to the manual.

Sep 22, 2013 | Texas Instruments TI-86 Calculator

### Inverse log function

For the common antilog, use the 10^x function available as the shifted function of the log key. For example, to calculate the common antilog of 2, press SHIFT log 2 =

If you want the natural (base-e) antilog, use e^x available as the shifted function of the ln key.

Aug 05, 2013 | Casio fx-115ES Plus Scientific Calculator

### How do i get inv on my TI-84 Plus caculator

To get the inverse trigonometric functions press the 2nd key then the trig function key. If you'll look at the key legends above the SIN, COS, and TAN keys you'll see the standard math notations for their inverse function.

Apr 05, 2012 | Texas Instruments TI-84 Plus Calculator

### I can not find the arc key or the INV key

The INV key that you may find on some scientific calculators has, on the TI 83/84/ Plus calculators, an equivalent key marked [2nd].

On the TI83/84 Plus, each trigonometric function has a second marking [SIN^-1], [COS^-1] or [TAN^-1]. To calculate the inverses of trigonometric functions ( arc sine, arc cosine, arc tangent) you press [2nd] followed by the relevant trigonometric function key For example, [2nd] [SIN] displays sin^-1( on the command line.

Unfortunately the hyperbolic functions and their inverses are only accessed through the CATALOG. You press [2nd][0] to open the CATALOG. Then you scroll down the CATALOG list to reach cosh(, cosh^-(, sinh(, sinh^-1(, tanh(, or tanh^-1(.
To speed the search in the catalog, you use the ALPHA keyboard: To reach cosh(, press[PRGM] and you scroll down from there.

Feb 27, 2012 | Texas Instruments TI-84 Plus Calculator

### I'm using the original TI-30 SOL calculator. Is there any way to do inverse sine or cosine?

Of course. Just press the INV key before pressing the appropriate trig function key. For example, to calculate the inverse sine, press INV then sin.

Apr 05, 2011 | Texas Instruments TI-30XA Calculator

### There is no shift key or 2nd button on my TI-30 SLR how do i access the functions above function keys

Use the INV button to access the secondary functions show above each button. Not very intuitive, unfortunately!

Oct 02, 2010 | Texas Instruments Scientific Calculator

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