Question about Texas Instruments TI-86 Calculator

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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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The inverse of log functions are power functions.

Inv of ln is exponential (e^x)

Inv of log in base 10 is 10^(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.

Inv of ln is exponential (e^x)

Inv of log in base 10 is 10^(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

The inverse of log functions are power functions.

Inv of ln is exponential (e^x)

Inv of log in base 10 is 10^(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.

Inv of ln is exponential (e^x)

Inv of log in base 10 is 10^(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

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.

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.

Sep 22, 2013 | Texas Instruments TI-86 Calculator

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.

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

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

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.

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

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

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

Oct 02, 2010 | Texas Instruments Scientific Calculator

Try the 2ND key instead of INV.

Mar 23, 2009 | Texas Instruments TI-84 Plus Calculator

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