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How do i do reciprocals on the TI-84 - Texas Instruments TI-84 Plus Calculator

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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.

Posted on Aug 25, 2010

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Reciprocal key


The key is marked x-superscript-negative-one and is just below the MATH key on the leftmost column of the keyboard.

Jan 28, 2014 | Texas Instruments TI-84 Plus Calculator

1 Answer

Reciprocal key


The key is marked x-superscript-negative-one and is just below the MATH key, left of the SIN key.

Jan 26, 2014 | Texas Instruments TI-84 Plus Calculator

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

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I have to take the secant of -1.2. I'm supposed to get a degree. I can't figure out the order to push buttons. PLEASE help!


TWO THINGS YOU NEED TO KNOW, Eli.1. Secant will NEVER return a degree measure (or even a radian measure) no matter what computer or calculator you use. The reason is because secant returns the ratio of sides (hypotenuse over adjacent), which has a range of and find its reciprocal (ie, flip the number upside down: the reciprocal of 5 is one-fifth). That's all.B. TI-84 only uses the three basic trig functions. Secant is the reciprocal of cosine. Therefore, in order to find the secant of -1.2 radians you need to be in Radian mode (see #2 above). From there, you just find the cosine of -1.2 and take that values reciprocal (ie, flip the number upside down: the reciprocal of 10 is point one) . That's all. Math lesson: 1 Radian = 180 Degrees. Therefore, 1.2 Radians is roughly one-third of pi, therefore it is roughly one-third of 180 degrees; therefore -1.2 radians would be nearly -60 degrees (a very friendly angle measure). I hope that helps If not, you should call Texas Instruments because they've got friendly people who are happy to assist anyone. Questions like this are right up their ally, advanced questions like the syntax of the poisson cumulative distribution function are not. So, you're fine. For in depth math help holler at www.THEMATHCHEETAH.comIn Short: Secant returns ratios and NOT degrees or radians. Secant is the reciprocal to cosine. Arcsecant WILL return degrees/radians. Your calculator can be set to either mode.TEXAS INSTRUMENTS >>>>> all calculators ever made.

Mar 08, 2011 | Texas Instruments TI-84 Plus Calculator

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How to calculate reciprocal on the Ti-84


there is a button on which x(-1) is written,this button is found to the left of the "sin" button.this acts as inverse. for e.g- if you want the inverse of 5, press 5 and then click on that button.

Feb 20, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

I have a TI-84 Plus Silver Edition calculator and I need to find the inverse key to get values for sin, cos, tan, csc, sec, cot. I'm past the lesson where you use the 2nd/sin, cos tan to find the...


There are no keys for cosecant, secant, and cotangent. You can calculate those ratios as

csc(x) = 1/sin(x)

sec(x) = 1/cos(x)

cot(x) = 1/tan(x)

Simply calculate the trig ratio on the right and then take its reciprocal.

Dec 14, 2010 | Texas Instruments TI-83 Plus Calculator

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Where is the inverse button.


It is the key labeled [X to -1] or [X^-1], the one below [MATH] and above [X^2]. This key is just to calculate the reciprocal of a displayed result. It does not calculate the inverse in the context of functions.
Alternatively, if you have not already entered the number or the expression, you can start by entering 1 [/] then the number then [ENTER].

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

2 Answers

How do I put cosecant, secant, and cotangent functions into my ti-84 plus?


By definition
  1. cosecant of X =1/sin(X), must not be confused with arc sine [sin^-1]
  2. secant of X =1/cos(X), must not be confused with arc cosine [cos^-1]
  3. cotangent of X =1/tan(X), must not be confused with arc tangent [tan^-1]
Because of these simple relations, calculator makers do not implement them with specific key sequences.
On this calculator, you have two ways to calculate one of these functions. EX cosecant of 37 degrees
  1. You enter 1 / [sin] 37 [ ) ] [ENTER] result is 1.661640141
  2. You enter [sin] [ ) ] 37 [ENTER] followed by [X^-1] to take the reciprocal of the previous answer. The [X^-1] key is the one just below [MATH].
A word of caution: secant cosecant and cotangent must not be confused with the inverse trigonometric functions arcsin, arccos, arctan

Jan 21, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

Recipricals


I haven't really used a TI-84 before, but if I'm not mistaken, the reciprocal key is the x raised to -1, see here: 99d0a9b.jpg
Hope this helps!

Sep 12, 2008 | Texas Instruments TI-84 Plus Calculator

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