Question about Texas Instruments TI-84 Plus Calculator

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.

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

Posted on Jul 28, 2009

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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Posted on Jan 02, 2017

Use the formulas

sec(x)=1/cos(x)

csc(x)=1/sin(x)

cot(x)=1/tan(x)

sec(x)=1/cos(x)

csc(x)=1/sin(x)

cot(x)=1/tan(x)

Jul 04, 2015 | Casio FX570MS Scientific Calculator

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.)

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

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.)

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

Aug 13, 2011 | Casio FX-115ES Scientific 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

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)

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

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

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

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

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

By definition

On this calculator, you have two ways to calculate one of these functions. EX cosecant of 37 degrees

- cosecant of X =1/sin(X), must not be confused with arc sine [sin^-1]
- secant of X =1/cos(X), must not be confused with arc cosine [cos^-1]
- cotangent of X =1/tan(X), must not be confused with arc tangent [tan^-1]

On this calculator, you have two ways to calculate one of these functions. EX cosecant of 37 degrees

- You enter 1 / [sin] 37 [ ) ] [ENTER] result is 1.661640141
- 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].

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

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.

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:

Hope it helps.

Oct 30, 2009 | Casio fx-300ES Calculator

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

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

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.

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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