Question about Casio FX-115ES Scientific Calculator

# Can u please specify the exact key to get the inverse

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Press the x^-1 key just to the right and below the big circular direction button at the top of the keyboard.

For example, to find the inverse of 0.5, press
0 . 5 x^-1 =

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## Related Questions:

### Hi when I solve my problem sin inverse the calculator show math error

Try using the arcsin function (usually SHIFT SIN or 2nd SIN, depending on the make and model) instead of SIN1/x.

If you require further assistance, please repost your question, including the make and model of your calculator, as well as the exact key sequence you're using.

Nov 12, 2016 | Office Equipment & Supplies

### Inverse cos of 52 degrees

The cosine of 52 degrees is about .6157 . The inverse cosine of .6157 is 52 degrees.

52 degrees is a measure of an angle. .6157 is a distance. The cosine of an angle results in a distance, while the inverse cosine of a distance results in an angle. There is no such thing as the inverse cosine of an angle, just as there is no such thing as the cosine of a distance. It's like asking "How heavy is one hour?"

If you're asking how to calculate a cosine or inverse cosine on your calculator, please specify the make and model of the calculator.

Jan 08, 2013 | Office Equipment & Supplies

### Where is the inverse key on the TI-84 silver edition?

That depends on what you want to invert.

If you want the multiplicative inverse (1/x) then it's the "1-superscript-minus-one" key just below the "MATH" key.

If you want the additive inverse then it's the "(-)" key just to the right of the decimal point key.

If you want the inverse of many of the built-in functions (like the trig functions) then press the "2ND" key at the upper-left before pressing the function key.

For the inverse of some functions you'll have to go through the menus.

If you have a particular inverse in mind, please reply to this post and specify exactly what you'd like to invert.

Jun 25, 2012 | Texas Instruments TI-84 Plus Silver...

### Where is the inverse key

It depends on what you want the inverse of. For many functions on the primary keys, you can get the inverse of that function by pressing 2ND and then the key. If you just want the inverse of a number, use the x^-1 key (located in the left column, just under the MATH key).

If you have something else in mind, feel free to reply to this post and specify what you want the inverse of.

Jun 04, 2012 | Texas Instruments TI-83 Plus Calculator

### Im pressing the buttom that everyone is saying is the inverse key but it is saying error. i really need help with this.

It is much more enlightning to tell us what you want to do rather than talk about something that does not exist. And one thing that does not mean anything is that ellusive INVERSE key that everyone and his dog is looking for.
The additive inverse of a number a is its opposite (-a). The key to use is the change key (-).
The multiplicative inverse of non-zero number a is its reciprocal 1/a
The inverse of the natural log (LN) function is the EXPONENTIAL function e^(x). On most calculators if one function is accessed diectly (the marking is on the key), its inverse is accessed by pressing [SHIF] (Casio, or [2nd] (TI) or [2ndF] (Sharp).
The inverse of the function raise 10 to a power [10^x] is [LOG]
Similarly, the inverse of the sine function SIN is the arcsine [sin^-1]. To access the latter, it you press [2nd][SIN]. The same is true for arcosine [2nd][COS], and arctangent [2nd][TAN]

The inverse of the square functions [x^2] is the square root function [2nd][x^2]
Inverse of x^3 is cubic root
This is just a quick overview.

Feb 16, 2012 | Texas Instruments TI-84 Plus Silver...

### Where is the inverse button on the casio fx-82ES

For the reciprocal of a number, enter the number then press the key marked with an x^-1. You might have to use the SHIFT key first. For inverse of trigonometric functions use the SHIFT key followed by the function name. The inverse of LN is e^x. The inverse of log is 10^x. To calculate the inverse of a matrix, enter the name of the (already created) square matrix then press x^-1.

Jan 09, 2012 | Casio FX-115ES Scientific Calculator

### Casio calculator fx115es inverse key not working consistently

The inverse sine is defined only for numbers in the range [-1, +1].
The sine of a number is at most 1.0. There is no number whose sine is 1.5, which is what you're asking for.
The same applies to the cosine and inverse cosine.

Oct 24, 2011 | Casio FX-115ES Scientific Calculator

### I need to know which button is the inverse button on my Ti-36X Pro please!

The inverse of what&? Each inverse function uses the same key (shifted) as its direct function. For the reciprocal key look for x^-1 or [1/X]

Sep 15, 2011 | Texas Instruments TI-36 X Solar Calculator

### How to calculate inverse of the matrix with 991 ES calculator ?

Press SHIFT [MATRIX], specify the matrix to be inverted, then x^-1.

Example #103 in the appendix shows the exact procedure for inverting the matrix entered in example #096. If you need the manual and the appendix, you can download them from
http://support.casio.com/manualfile.php?rgn=1&cid=004001004

May 09, 2011 | Casio FX-115ES Scientific Calculator

### Cos+tan(sin)=sec

This is a trigonometry problem not a calculator's.
cos(x) +tan(x).sin(x) = ( cos(x) + (sin(x)/cos(x)).sin(x). After reduction to the same denominator (which is cos(x)) you obtain

{cos(x).cos(x) + sin(x).sin(x)} divided by cos(x).
The content of the bracket above is just 1.
Your fraction will have 1 as numerator and cos(x) as denomitor. That is exactly the definition of the secant function i.e. Function sec is the reciprocal (not the inverse) of the cos function, while the arccos is the inverse of cos.

A mild advice: Avoid writing function without specifying the argument (the variable on which a function acts).

Note:

Aug 14, 2009 | Casio FX-115ES Scientific Calculator

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