Question about Texas Instruments TI-30XA Calculator

Re: Reciprocal

The correct key is the key showing 1/X. This key will give you the reciprocal.

Posted on Oct 06, 2008

Re: Reciprocal

An alternate symbol is x~1 (x raised minus 1)

Posted on Feb 13, 2008

Re: Reciprocal

Sec 23

Posted on Jan 09, 2008

SOURCE: TI-30xa Calculator Reciprocal Key

It does. For instance, to get the reciprocal of 4, enter the following sequence: 4 [1/x] (this last key to be found third row down, second black key in). The decimal 0.25 will appear as the result. Convert this, if you want, to the fraction 1/4 by pressing the yellow function key [2nd], then {F<>D] located bottom, far left. Hope that's what you wanted!

Posted on Oct 04, 2007

Your question is not clear. To calculate the reciprocal of a number on display use the x^-1 or 1/x key, or just enter 1/ number.

Jul 01, 2014 | Texas Instruments TI-30XA Calculator

Enter the number and press the = sign.

With the number displayed, press the power key (marked as [X^y], [Y^x] or [^]) followed by exponent -1.

OR while the number is stored in Ans memory, enter 1 / Ans.

Some calculators have a special key for the reciprocal. It is marked as [x^-1]. By pressing the reciprocal key while number is displayed, you calculate its reciprocal.

With the number displayed, press the power key (marked as [X^y], [Y^x] or [^]) followed by exponent -1.

OR while the number is stored in Ans memory, enter 1 / Ans.

Some calculators have a special key for the reciprocal. It is marked as [x^-1]. By pressing the reciprocal key while number is displayed, you calculate its reciprocal.

Feb 05, 2014 | Sharp el-531x scientific calculator

Use the 1/x key or the general power key x^-1.

By hand 0.6=3/5

The reciprocal of 3/5 is 5/3

By hand 0.6=3/5

The reciprocal of 3/5 is 5/3

Jan 29, 2014 | Calculators

Does it refuse to do so or does it give an error message?

Three common errors:

Three common errors:

- Not having the correct angle unit.
**Wrong result, No error message** - Confusing reciprocal of sine (1/sin(x) with arc sine (x) ,sin^-1(x). Confusing the reciprocal of cosine, 1/cos(x) with arc cosine (cos^-1(x)).
**Wrong result, No error message** - Taking the argument of the inverse sine and/or inverse cosine functions outside the interval [-1,1].
**This gives a domain error.**

Oct 28, 2013 | Texas Instruments TI-81 Calculator

There are two solutions: 2/3 and -3.

If this is a homework problem, be sure to show your work.

If this is a homework problem, be sure to show your work.

Sep 06, 2011 | Texas Instruments TI-30XA Calculator

There is a key on the left column of keys, below the MATH key and above the x^2 key. It is marked with an x raised to power of -1.

It computes the reciprocal of the number displayed.

It computes the reciprocal of the number displayed.

Aug 25, 2010 | Texas Instruments TI-84 Plus Calculator

There isn't a cosecant key. Use the relationship

csc(x) = 1 / sin(x)

Compute the sine and take its reciprocal.

csc(x) = 1 / sin(x)

Compute the sine and take its reciprocal.

Apr 03, 2010 | Texas Instruments TI-30XA Calculator

The cosecant function does not have a specific key on any calculator because it can be easily calculated as the reciprocal of sine.

Thus csc(-330°)=1/sin(-330°)=2

sin(-330°)=sin(360°-330°)=sin(30°)=0.5

csc(-330°)=1/0.5=2

If you do not want to be bothered with these facts, just calculate the sine of -330° and take the reciprocal of the result using the [x^-1] key. For the minus sign before 330, use the change sign key (-). Close the right parenthesis.

[SIN] [(-)] 330 [)] [x^-1]

Thus csc(-330°)=1/sin(-330°)=2

sin(-330°)=sin(360°-330°)=sin(30°)=0.5

csc(-330°)=1/0.5=2

If you do not want to be bothered with these facts, just calculate the sine of -330° and take the reciprocal of the result using the [x^-1] key. For the minus sign before 330, use the change sign key (-). Close the right parenthesis.

[SIN] [(-)] 330 [)] [x^-1]

Jan 21, 2010 | Texas Instruments TI-30 XIIS Calculator

There is no log (base 10) button on a TI-89. It's buried in the CATALOG as log(. As a shortcut, you can do ln(#)/ln(base), where # and base are replaced with what you want. For the inverse of a log, do the base raised to the part on the other side of the equals sign. So, log(x) = 2 would become 10^2 = x.

Jul 16, 2008 | Texas Instruments TI-89 Calculator

It does. For instance, to get the reciprocal of 4, enter the following sequence:
4 [1/x] (this last key to be found third row down, second black key in). The decimal 0.25 will appear as the result. Convert this, if you want, to the fraction 1/4 by pressing the yellow function key [2nd], then {F<>D] located bottom, far left.
Hope that's what you wanted!

Sep 28, 2007 | Texas Instruments TI-30XA Calculator

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