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Arccos(1.202) - Texas Instruments TI-84 Plus Calculator

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How do you change the interval for a arc cos


I'm not sure of the question, but to plot arccos set mode to: graph='function' and angle to 'degrees' (for example). Go to WINDOW and set xmin=-1, xmax=1, xscl=0.1, ymin=0, ymax=180, yscl=50, and xres=1. Press GRAPH. You will get a plot of arccos from -1 to 1.

Mar 31, 2014 | Texas Instruments TI-89 Calculator

1 Answer

Ti-Nspire gives me coordinates in radians when my mode is set to degrees.


That is a round-about way to solve cos(x)=0.543 by graphing. Use the inverse function of the cosine arccos or cos^-1
If cos(x)=0.543 then x=arccos(0.543)
To graph a trigonometric function it is more natural to use the radian as the unit. However in geometry it is more common to use the degree. To solve an equation like x=arccos(0.543) where you want the answer to be degree, change the document settings to make the default angle unit the degree.


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Make the graphing angle unit the degree and set that as default by selecting Make Default and press Enter.

Dec 15, 2013 | Texas Instruments TI-Nspire CX Graphing...

1 Answer

How do I input secant^2


Secant is the reciprocal of cosine
sec(x)=1/cos(x)
Do not confuse it with the inverse of the cosine function, which is arccos(x) =cos^-1(x)

Sep 24, 2013 | Texas Instruments TI-84 Plus Calculator

1 Answer

Enter arccos


Press SHIFT then the cos key.

Aug 29, 2013 | Casio FX-115MS Plus Calculator

2 Answers

How do you input arccos


Press 2nd SIN 3 2 / 1 4 5 ) =

Make sure you have the desired angular mode set before you do this.

Jun 22, 2013 | Texas Instruments TI 30XIIS Scientific...

1 Answer

My calculator wont graph arccos? please help


Make sure x is in the range [-1, +1]. The arccosine function is undefined for arguments whose magnitude exceed one.

Jun 19, 2012 | Texas Instruments TI-84 Plus Calculator

1 Answer

How do I get -tan,-sin,-cos for inverse ratios


If you want the inverse trig functions (arctan, arcsin, and arccos), press the yellow 2nd key before pressing the appropriate trig function key. If you want a negative value, press the +/- key between the decimal point and = keys.

Mar 09, 2011 | Texas Instruments TI-30XA Calculator

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I get ERR:DOMAIN every time I enter an inverse trig function


Is your Ti83 plus in degree mode. You can change to radians by pressing the MODE key, and sliding down 2 more positions, and press the ENTER key. Because you got this error your principle value for x and y should be examined. Generally you really should be in radian mode when working with arcsin (aka. sin^-1), and arccos. You probably weren't using arctan because, you would have never gotten this error message due to the fact it goes on forever. And this way your answers for y= arcsin(x), or arccos(x) will be on the x axis, and domains at 0, pi/2, and pi.

You can work in degree mode but, if the number you place in the brackets of your arc sin or arc cos function is larger than 1 or smaller than -1 you will get a ERR:DOMAIN. Using the arctan or (aka. inverse tan) function in the degree mode can be used for computing endless waves, or as an angles that are usually in brackets of cosine or sine. Example: cos(arctan(Beta). This functions that y to never be greater than 1 or, less than 0. Example: sin(arctan(angle). This functions that y to never be less than -1 or, greater than 1.

I hope this answers your question to why you got this error and, helps you to decide on what the correct mode setting should be.

Dec 17, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

How do i enter sec^-1(1.85)


You cannot enter it on the calculator but you can use the relation arcsec(z) =arccos(1/z)
On your calculator arccos is represented as cos^-1.
Here is a screen capture from a calculator that has the function. The arcos is computed along with the arcsec for angles in radians (top 2 lines) and in degrees (bottom two lines).

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Sep 09, 2010 | Texas Instruments TI-84 Plus Silver...

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