Question about Texas Instruments TI-84 Plus Calculator

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How do I use secant, cosecant, and cotangent?

I would like to use the secant, cosecant, and cotangent functions. I can graph them, but I am having problems using these functions in problems. I input them as the reciprocal of the sine, cosine, and cotangent functions, but I am getting a syntax error.

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Try inputting using brackets (sin(angle))^-1 or 1/(sin(angle))

Posted on Jul 28, 2009

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After inputing the degee Digits input a degree sign. To do that, hit ANGLE and choose the degree sign from there.

GL

Posted on Aug 19, 2009

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1 Answer

How do I use secant, cosecant, and cotangent?


Use the formulas
sec(x)=1/cos(x)
csc(x)=1/sin(x)
cot(x)=1/tan(x)

Jul 04, 2015 | Casio FX570MS Scientific Calculator

1 Answer

I am working with an older cassio the fx-9750g plus trying to graph 3sec(x)-6=0 and I cannot figure out how to make this work


Sorry if that sounds like lecturing, but I have to set the terminology straight. What you wrote is an equation and it can only be solved for the values of x (there is an infinity of them, because of periodicity).
However, if you meant to graph the function y=3sec(x)-6, here is how to do it on the not so old FX9750G Plus.
1.Turn the calculator on.
2. If you see no icons press the MENU key.
3. Use arrows to move focus to the GRAPH application (or press press 5).
4. In the Y= editor type in after the = sign [3] [/][COS] [(] [X, Theta,T] [-] [6][EXE]
5. Press [F6:Draw].
After drawing it, you may play with the zoom or the windows dimensions to focus on a particular region of the graph.
Note: On most calculators there is no command for the secant, cosecant, nor the cotangent functions. One uses the equivalent definitions: 1/cos(X), 1/sin(X), and 1/tan(X) respectively.
Here is what your function looks like (with angle unit in radians.)

k24674_115.jpg
and here is the function y=sec(x).

k24674_116.jpg

Aug 13, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

How do you find the secant button on a TI89 Titanium Calculator?


You would need to push the Green diamond button. Then press the Z button. If you look above the Z button, it says cos in blue and cos-1 in green. cos^-1 is the same as secant. sin^-1 is the same as cosecant. tan^-1 is the same as cotangent.

Jun 08, 2011 | Computers & Internet

1 Answer

When do I use the x-1 key and when do I use the inverse function keys? I know inverse function keys provide cosecant, secant and cotangent, but is that all they are used for?


Use x-1 to calculate 1/x (x to the negative-one power).

What I think you're calling the inverse function keys actually calculate arcsine, arccosine, and arctangent.

To calculate cosecant x, for example, use the relationship
csc(x) = 1/sin(x)

Sep 22, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

Confusion on creating a prograM


"Input" is a command, which inputs a value. Try this:

Input X:tan^-1(1/X)

Apr 14, 2010 | Texas Instruments TI-84 Plus Silver...

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

How to use trig function keys on my casio fx-300ES


Hello,
You have 3 keys for the main trigonometric functions: [SIN], [COS] and [TAN]
To use them correctly you must set the angle unit to the one your problem calls for.
Press [SIFT][MODE] [3:Deg] for degree, [4:Rad] for radian, [5:Grad] for grad. Dependig on angle unit chosen a small D, R, or G appears on the top of the screen.

If you need the inverse trigonometric functions arcsine, arccosine, arctangent, you access them by first pressing the [SHIFT] key
Thus
arcsine [SHIFT][SIN] (sin^-1)
arcosine [SHIFT][COS] (cos^-1)
arctangent [SHIFT][TAN] (tan^-1)

The syntax for the function is
[SIN] # [ ) ] [=]; [SIN] 30 [ ) ] [=] gives 0.5
[COS] # [ ) ] [=] [COS] 19 [ ) ] [=] gives 0.945518576

Note: if the argument of the functions are numbers, the right parenthesis is not necessary. But if the argument is an expression (with various operations) better put the parenthesis to make sure the calculator is performing as one wants it to.

By the way, there are no keys, or key combinations to calculate cotangent, cosecant, and secant, but you can use the definitions:

cotangent (x) = 1/tan(x) Do not confuse it with tan^-1
cosecant(x) = 1/sin(x) Do not confuse it with sin^-1
secant(x) = 1/cos(x) Do not confuse it with cos^-1

Hope it helps.

Oct 30, 2009 | Casio fx-300ES Calculator

1 Answer

Inverse Functions on Casio fx-270W PLUS don't seem to work


because cotangent, cosecant, and secant are all inverse trig functions, just type in 1 / |shift| trig function and the number if you are finding the angles. It might not be a dedicated button, but its an extra push, and it will give you the same result. *note that I put the shift press only because that is how you get the inverse tan to get an angle from a tan ratio.*

May 04, 2009 | Casio FX-270W Calculator

3 Answers

Trig functions of the TI-30XA


if the sides of a triangle are 15cm ,16cm, and 17 cm ,then the area of the triangle is what ?

May 09, 2008 | Texas Instruments TI-30XA Calculator

1 Answer

Csc, sec functions


Hello,
I have not yet seen a calculator that has a dedicated key for the cosecant , secant, nor cotangente functions, because they are directly connected with the sine, the cosine, and the tangente.

Cosecant (x) = 1/sin(x)
Secant (x) = 1/cos(x)
Cotangente(x) = 1/tan(x)

Do not confuse these functions with the inverse trigonometric functions, usually represented as
arccosine = arccos; on calculators cos^-1,
arcsine = arcsin ; on calculators sin^-1
arctangent= arctan ; on aclculators tan^-1

Hope it helps.

Feb 08, 2008 | Casio FX-115W Plus Calculator

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