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

Hello, i recently bought my TI-84 Plus graphing calc. and i went to do some angle math, when i kept getting wrong answers; because the Tan Sin and Cos are all wrong!

For Example: I i enter Tan( 3 and i get the answer -.1425465431

Cos is -.9899924966

Sin is .1411200081

Is this as simple as hitting reset? Or what should i do to help fix my calculator before school.

Thanks for Everything,

KC

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Posted on Jan 02, 2017

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Make sure you have the proper angle mode set. Press MODE and check the third line.

Feb 03, 2014 | Texas Instruments TI-83 Plus Calculator

To get the inverse trigonometric functions press the 2nd key then the trig function key. If you'll look at the key legends above the SIN, COS, and TAN keys you'll see the standard math notations for their inverse function.

Apr 05, 2012 | Texas Instruments TI-84 Plus Calculator

Press the SIN, COS, or TAN key, type in the angle, and press ENTER. For example, to calculate the sine of 45 degrees, press SIN 4 5 ENTER

Make sure you have the angular mode set to degrees. It's the third line on the mode screen, which you get by pressing the MODE key.

Make sure you have the angular mode set to degrees. It's the third line on the mode screen, which you get by pressing the MODE key.

Jan 30, 2011 | Texas Instruments TI-84 Plus Silver...

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.

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

Having gone over a month without a response to my query, I assume it was a matter of the angular mode setting

Sep 20, 2010 | Texas Instruments TI-84 Plus Calculator

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,

That habit of TI, Casio, and Sharp to label the inverse trigonometric functions with the -1 superscript can cause confusions.

Hope it helps

That habit of TI, Casio, and Sharp to label the inverse trigonometric functions with the -1 superscript can cause confusions.

- The inverse trigonometric functions arcosine, arcsine, and arctangent (labeled by manufacturers as cos^-1, sin^-1, and tan^-1) should not be confused with the other trigonometric functions known as secant(x) =1/cos(x), cosecant(x)=1/sin(x) and cotangent(x) = 1/tan(x).
- To avoid errors in the use of the inverse trigonometric functions, one must be careful and set the angle unit to the one required by the problem at hand (degrees, or radians)
- To make the trigonometric functions really functions, their range is restricted.
- In this calculator arcosine (x) gives results between 0 and 180 degrees (if angle MODE is Degree) or between 0 and Pi radians (if angle MODE is Radian).
- The range of results for arcsine(x) and arctangent(x) is between -90 degrees and +90 degrees (if angle MODE Degree) or -Pi/2 and Pi/2 (if angle MODE is Radian)

Hope it helps

Nov 06, 2009 | Texas Instruments TI-83 Plus Calculator

Your calculator is set in radians. Press mode key. Arrow down to 3rd line. Highlight degree and press enter. Your calculator is now in degrees, not radians. To get out of the mode screen and back to home screen, press 2nd and then mode.

Aug 05, 2009 | Texas Instruments TI-84 Plus Calculator

for function = (sin,cos,tan,sec,cosec,cotan)

arc(function) = function^-1, calculated in the first quadrant for simplicity(0-pi/2) (0-90deg), as all functions repeat circularly

just another method of notation

http://www.mathwords.com/t/tangent_inverse.htm

arc(function) = function^-1, calculated in the first quadrant for simplicity(0-pi/2) (0-90deg), as all functions repeat circularly

just another method of notation

http://www.mathwords.com/t/tangent_inverse.htm

Jun 19, 2008 | Texas Instruments TI-84 Plus Silver...

here are the steps in changing it from radian to degrees

1. turn on your TI-83 plus

2. press the MODE button near the top of your calculator

3.go down to options and move the highlight from radian to degree, press enter and clear

you're good to go

1. turn on your TI-83 plus

2. press the MODE button near the top of your calculator

3.go down to options and move the highlight from radian to degree, press enter and clear

you're good to go

Feb 17, 2007 | Texas Instruments TI-83 Plus Calculator

Jul 21, 2014 | Texas Instruments TI-84 Plus Silver...

Jun 14, 2014 | Texas Instruments TI-84 Plus Silver...

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Usually answered in minutes!

Fixed it lol, i just changed the default Radian option in Mode to Degree. Thanks anyway.

thank you! !!

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