Question about Texas Instruments TI-83 Plus Calculator

# Need help withe the sin, cos, tan problem with ti - 83 plus

Whenever i press sin, cos, or tan, put in a number, and press enter, a wrong answer always comes up. when i do it another calculator, the correct answer comes up. how can i fix this problem? i know there is a way to do this.

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• Anonymous Feb 26, 2008

whenever i press sin, cos, or tan, put in a number, and press enter, a wrong answer always comes up. when i do it another calculator, the correct answer comes up.

• zebras6969 Mar 27, 2008

automatically rounding all of my answers how do i turn the rounding off?????????

• Anonymous May 05, 2008

The exact same thing happens for me. I have SATs tomorrow with a calculater that doesn`t do SIN COS or TAN right.

oh no.

• lmah May 31, 2008

I don't know the sequence of keys to punch to get angles from sines, cosines and tangents, and vice versa.

• Anonymous Aug 04, 2008

I am having the same problem as angelsmiley. Can you help?

• Anonymous Sep 21, 2008

I have the same problem! HELP ME!!!

• Anonymous Oct 23, 2008

Same problem!

• Anonymous Jan 21, 2009

How can I change the settings on my TI-83 so that I am entering degrees with solving for tan,cos,sin instead of another unit?

• Scott77 Mar 14, 2017

• Smith77 May 16, 2017

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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

Posted on Nov 09, 2007

• doodlebugg Sep 18, 2010

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• Jesper Pedersen Dec 11, 2013

Thank you so much!!! THANKS THANKS THANKS!!! OMG THANKS

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Just change the mode... from "rad" to "deg"

Posted on Mar 17, 2007

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To extract an angular degree from a sin, cos, or tan (reciprocal), use [2nd][TAN], [SIN], or [COS]. For example ... To get the angular degree for tan .5760, cycle [DRG] to set the entry mode to "DEG", then enter [.5760][2nd][TAN]. This calls the yellow function above the [TAN] key, TAN^-1^ and returns the decimal result 29.94. To change the display mode to show degrees, minutes, and seconds (DMS) with [2nd][=]. To change the display back to decimal use [2nd][+]. Note that to use degrees in calculations they must be in decimal mode. To convert the result between deg, rad, or grad, cycle [2nd][DRG].

Posted on Oct 08, 2007

• bearded Oct 08, 2007

can someone DELETE that POST, please - wrong question , wrong calculator. :D

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Umm, isnt that where you press MODE and change it from radian to degrees?

Posted on Apr 27, 2009

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For the TI-30Xa ... set entery mode to "deg" with [DRG], then input number and press [SIN], [COS], OR [TAN]. Most functions on that model require the pattern number, function. Here's a link to the TI-30Xa user manual in PDF format ... http://www.usm.maine.edu/math/120D/TI30xa.pdf

Posted on Oct 08, 2007

• bearded Oct 09, 2007

CONVERSELY ...

To extract the angular degree from a sin, cos, or tan, use [2nd][SIN], [COS], or [TAN], respectively. For example ...

To get the angular degree for tan .5760, cycle [DRG] to set the entry mode to "DEG", then enter [.5760][2nd][TAN]. This calls the yellow function above the [TAN] key, TAN^-1^ and returns the angle as a decimal ... 29.94.

To change the display mode to show degrees, minutes, and seconds (DMS), use [2nd][=]. To change the display back to decimal, use [2nd][+]. Note: to use degree values in calculations they must be in decimal display mode.

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I'm not too sure what the actual problem is.
If the problem has nothing to deal with your mode not being in deg then I think it might be your input method.

Maybe you can provide an example?
Such as... sin 90.
So what you said is, you enter...
1)sin
2)number (in this case 90)
3)enter [=]

This will appear to be 90 on your F-502, which is obviously incorrect. For some strange reason, it operates different and you have to enter it in the different order.

1)number (in this case 90)
2)sin

This should give you an answer, without having to press enter [=], of 1, which is in fact correct.

Posted on Nov 09, 2007

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On your calculator, check to make sure it is on degrees instead of radian. maybe that's why. hope i helped.

Posted on May 14, 2009

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CHECK YOUR MODE TO MAKE SURE YOU ARE IN DEGREES OR IN RADIANS

Posted on Nov 30, 2010

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To solve this problem locate the mode button on your TI83 calculator , press this and come down to where you see radian. once here use the right arrow to move to degree then press enter and clear.

kendrick!!!

Posted on Sep 21, 2009

Whats the diff between radians and degrees, like will it effect regular calculations?

Posted on May 08, 2008

Some keys not working

Posted on Jan 22, 2008

Posted on Jan 03, 2008

Make sure it's in the right mode, i.e. radians, degress. check it under set up

Posted on May 21, 2007

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Make sure your Ti-30xs is in deg. mode you can check this by looking at the top left of your screen it will show you what mode it is in. if it is in deg. mode sorry idk...

Posted on Feb 09, 2009

Input the number first.
Press the trig function next.
That's it.

For example:
Press '3' and '0'.
Press 'SIN'
The display shows the answer:  0.500

Posted on Oct 31, 2007

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From the description it's not a mode problem, it's a PBCAK - Problem Between Chair and Keyboard. This is a Reverse Polish Notation calculator. The correct way to get the sin of something is NOT "press sin, cos, or tan, put in a number, and press enter" it is "put in number and press sin, cos, or tan". Data first, then function. If you need to input more than one datum, use the ENTER key: "2 ENTER 2 +"

Posted on Nov 09, 2007

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Posted on Jan 02, 2017

SOURCE: Tan Cos and Sin errors

go to:

mode
select DEGREE rather than RADIAN three lines down.

Posted on Jan 21, 2009

To put it in Scientific mode, press MODE then use your right arrow to move your cursor one spot to SCI. Press ENTER then press CLEAR.

Posted on Jun 16, 2009

Most likely you do have the calculator in radians (or if you are working in radians, you have it in degrees). Press the mode button, move cruser down to "radians degrees" highlight degrees. and press "2nd quit". things sould be better!

Posted on Jun 03, 2010

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## Related Questions:

### Sin cos tan ti 83

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

### How do i work out the Sin, Cos, and Tan on the TI-83 plus?

First, make sure you have the appropriate angular mode set. To change the angular mode, press MODE, use the arrow keys to highlight either "RADIAN" or "DEGREE" on the third line, press ENTER, then press 2ND [QUIT].

Press the appropriate sin, cos, or tan key (two rows above the 7, 8, and 9 keys), enter the angle, close the parenthesis, and press ENTER. For example, to calculate the sin of 2.1, press
SIN 2 . 1 ) ENTER

Jun 07, 2011 | Texas Instruments TI-83 Plus Calculator

### My TI-83 calculator doesnt gives me the solutions for tangents that have a negative number. Ex. tan(-1) -5/2

Once you reset your calculator, everything should be fine. Sometimes your calculator's memory stores your cos, tan, and sin and messes up your calucations.T o reset your calculator:
1. Press 2nd then MEM (which is above the + key)
2. Press 7 to reset
3. Press 2 for default
4. Press 2 again to reset defaults
5. Press enter
6. Done.
You should be able to get the answer for that, which is 3.8935, in radians at least. :)

Mar 06, 2011 | Texas Instruments TI-83 Plus Calculator

### Sin, cos, and tan do not seem to work properly.

Press "Mode" Check to see if you are in radian mode or degree mode (one of the top categories)
If you are entering your numbers from sin, cos, and tan as degrees and you are in radians, your answers will be off. Same goes for if you are inputting radians while in degree mode. Hope this helps

Dec 26, 2010 | Texas Instruments TI-83 Plus Calculator

### 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

### Whenever i put in sin or cos or tan on my calculator the wrong answer comes up, how do i fix this?

Most likely you do have the calculator in radians (or if you are working in radians, you have it in degrees). Press the mode button, move cruser down to "radians degrees" highlight degrees. and press "2nd quit". things sould be better!

Jun 03, 2010 | Texas Instruments TI-83 Plus Calculator

Hello,
To avoid problems,set your angle unit to radians by default. Press [MODE]. If Radian is highlighted (text on black background), it is indeed the default mode. If Degreee is highlighted, scroll dowm to the line and use the left arrow to select Radian and press ENTER. Radian will start blinking.
Any number you feed a function that acts on angles (sin, cos, tan) will be considered in radians. Any result that comes out of the inverse trigonometric functions (arcsin, arccos, arctan) is in radian. The angle coming from a conversion from cartesian coordinates to polar coordinates is in radian.
You have a simple way to convert the value from radians to degrees because 1 rad=180/pi. Store this value in a variable [STO->] D
180/[2nd][PI] [STO->] D

Since the last result is always stored in [Ans] all you have to do is to multiply by D: [Ans][x][ALPHA]D converts results in degrees.

Hope it helps

Sep 14, 2009 | Texas Instruments TI-83 Plus Calculator

### Wrong trig ratio

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

### Cannot calclate sin cos tan with texas inst ti-83 plus

To put it in Scientific mode, press MODE then use your right arrow to move your cursor one spot to SCI. Press ENTER then press CLEAR.

May 31, 2009 | Texas Instruments TI-83 Plus Calculator

### Tan Cos and Sin errors

go to:

mode
select DEGREE rather than RADIAN three lines down.

Aug 20, 2008 | Texas Instruments TI-84 Plus Silver...

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