Question about Texas Instruments TI-84 Plus Silver Edition Graphic Calculator

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I have a TI-84 Plus. need help finding sine of an angle

I bought the TI-84 Plus calculator and I am having problem to solve problems with Sine angles foe instance the Sine of 40 angle this calculatir gives me . 8509035245 and this is not the corect answer. Please help me how to get the sine of an angle. Julian

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  • Anonymous Mar 22, 2014

    In need to find and angle based on its sine using Basic - a computer language.



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Make sure that your mode is in degree, not radian. YOu can change it by simply press mode and move down to the degree selection and press enter.

Posted on Mar 18, 2009

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How do I find the csc of an angle

The cosecant of an angle is one divided by the sine of the angle. As an example, to calculate csc(2), press SIN 2 ) x^-1 or 1 / SIN 2 =

Nov 04, 2012 | Texas Instruments TI-84 Plus Silver...

1 Answer

Sine graph is straight

If the angle unit is set to degrees and you use the standard window dimensions (Xmin=-10, Xmax=10) then all you will see is a straight line: Between 0 and 10 degrees, the sine is approximately equal to 0 and the cosine is about 1.

To see the features of the trigonometric functions you must do one of the following
  1. Set angle to degree but set window dimensions to span the domain -180 to 180 or larger.
  2. Set windows dimensions to the standard -10, 10 range but set angle degree to radians

May 12, 2012 | Texas Instruments TI-84 Plus Calculator

1 Answer

How can I graph sine and cosine waves on my TI-84 Plus? I can see the Theta symbol on the "X,T, "Theta",n" button. But whenever I try to graph a function, it doesn't work. Please...

When you graph functions y=f(x), even if f(x) is a trigonometric function, the default independent variable is x. You will have to use the variable theta only when drawing polar functions.
To draw the sine and cosine or any other trigonometric function set the angle unit to radians and window zoom to standard. If your angle unit is degree you must modify the x-window range to, say, multiples of 180 degrees. Other than that there is nothing special to do. The functions are well-behaved and should graph nicely. You will alos get a better view if Ymin is about -1.2 and Ymax is about 1.2

May 22, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

I'm trying to do inverse sine and cosine equations but I'm receiving a message that there is a domain error. Is there anything I can do or press like a reset button?

The inverse sine and cosine equations mean "angle who's sine/cosine is:" The bounds of the arguments for these functions must be between 1 and -1, the maximum and minimum values of the sine and cosine functions, because no angle can have a sine or cosine that is greater than 1 or smaller than -1. Also it should be noted that the inverse sine/cosine function is not the same as 1/sine or 1/cosine, although the symbol makes it look like that.

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

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I get err:domain on my TI-84 plus when i do Sin -1 (60) why?

While the domain of the sine function is the whole of the real line, it range spans the interval [-1,1]. In other words the sine of an arbitrary angle is imperatively somewhere in the closed interval [-1,1].
So when you want to find the arc sine corresponding to a given value of a sine function, you cannot give as argument to the arc sine [sin^-1] a value that lies outside the interval [-1,1].

For your case, the argument is 60 and it is outside the permitted domain [-1,1]. That is why the calculator protests by signaling a domain error.

Oct 28, 2010 | Texas Instruments TI-84 Plus Calculator

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TI-84 Incorrect sin/cos/tan values

What is so surprising? The sine and cosine functions have ranges that span the closed interval [-1,1]. As to the tangent function, its range is the the whole real line.

This being said, you should keep in mind that there are three angle units: the degree, the radian, and the grad.
When you want to calculate the sine, cosine, or tangent of a number, that number is not just a number. It is an angle, and as an angle it has a unit.

For this reason a calculator generally has two angle units defined (degree and radian), and possibly the grad. BEFORE calculating any trigonometric function you must ascertain that the angle is in the correct unit.

Clearly, in the problem you are trying to solve angle values are given in degrees, but your calculator is configured to interpret angles values in radians.

To set the default angle unit to degree press [MODE] , then press down arrow twice to reach the line (radian, degree). Highlight the word degree and press [ENTER] to set the default angle unit to degree.

Unfortunately the TI 8xPLUS family of calculators does not have a status bar on screen to remind you of the modes, and if you do not remember to check the current unit you get errors (at least unexpected results).

However, there is a way to avoid the errors and that is to enter the unit explicitly after the angle value. To do that you press [2nd][APPS] to open the (ANGLE) menu list. Try it.
  1. First item in list is the degree symbol, a raised 0
  2. 2nd is the minute, an apostrophe
  3. 3rd is radian, a raised r
By selecting the degree symbol and pressing [ENTER}, that symbol echoes on the screen just after the angle value. Closing the right parenthesis of the trigonometric function and pressing [ENTER] will give you the result in the correct unit of your choice. This can be done regardless of the default unit the calculator is configured for.

Jan 21, 2010 | Texas Instruments TI-84 Plus Silver...

1 Answer

If you are given the measure of the angel how do you find the sin

It is simple.
  1. First you verify that the angle unit of the calculator is the same as the angle unit of the nagle the sine of which you want to calculate.
  2. To verify that, press [MODE]. On the screen that is diplayed, on the line Angle, make sure that the angle unit is the same as your angle.
  3. If it is not, you use the left or right arrow to highlight Radian or Degree and press [ENTER].
  4. Press [2nd][QUIT] to go back to the main calculator screen.
  5. You press the key [SIN].
  6. On the screen appears sin(. After the parenthesis, type in the angle measure and close right parenthesis.
  7. Press [ENTER]. The value is displayed on the next line.
Hope it helps.

Nov 10, 2009 | Texas Instruments TI-84 Plus 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

2 Answers

Trigonometric functions

Put the calculator in radian mode. Find the sine of the angle (sin(angle)), invert the result (1/x or x^(-1)). csc = 1 / sin

Jan 27, 2007 | Texas Instruments TI-86 Calculator

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