Question about Texas Instruments TI-30XA Calculator

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Trig functions of the TI-30XA

How can I use secant and cosecant functions on the TI 30XA? I am currently needing these functions for navigating great circle calculations.

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  • Anonymous May 13, 2008

    mi is on it and need to take it off

  • Anonymous Mar 12, 2014

    how to short the reset pad on a ti-30xa

  • Anonymous Mar 13, 2014

    how do i put ti-30xa in theta mode



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

Posted on Jun 16, 2008


Cosecantx = 1/sinx

Use these identities to get at the trig functions not represented on the calculator.
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Also to get the angles you need to use the inverse trig functions (for example sin^(-1) (2nd SIN))

Posted on Jun 12, 2008


How do i find angles using the sin, cos and tan in trig?

Posted on May 12, 2008

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Posted on Jan 02, 2017

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1 Answer

What does DEG on screen of TI-30Xa mean

It means your calculator is set to degrees mode. Angles can be measured using three different units: degrees (360 degrees in a circle), radians (2pi radians in a circle), or grads (400 grads in a circle).

Pressing the DRG key cycles through the three modes. No matter which mode you select, one of the annunciators will appear on the screen to indicate the current mode.

Dec 07, 2013 | Texas Instruments TI-30XA 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

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


The cosecant function is defined by
cosec(x) = 1/sin(x)

1[/] [sin] x.
Do not confuse this function with the arcsine function which is accessed by [2nd][sin to the -1]. When you use trigonometric functions make sure that the angle unit (Rad, dgree, grad) is the one you want.

Hope it helps.

Sep 18, 2009 | Texas Instruments TI-30XA Calculator

2 Answers

How do I use secant, cosecant, and cotangent?

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

Jul 27, 2009 | Texas Instruments TI-84 Plus 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

1 Answer

Csc, sec functions

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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