Question about Texas Instruments TI-84 Plus Calculator

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Button Problems I need some help with my calculator. Recently my right side buttons ( VARS, TAN, ), 9, 6, and 3) have been messing up. Whenever I press those buttons, the negative (-) symbol always comes up. Whenever I press 2ND and then one of the buttons, answer (Ans) comes up. Does anybody know how to fix this? Things I've tried: -Changed batteries -Cleared RAM -Cleared all memory Thanks for any help.

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Happened to me be4, except all my buttons didn' t work. I just did what people do in movies. throw it aroun, step on it, bang it against walls, desks , ect. Then my teacher took it away. The banging cleared all my ram. It was weird, but it started working.

I think the circuit board moved, and i hit it back into alignment.

Posted on Jun 03, 2008

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I cannot find the Catalog button on my TI-82 calculator. Thanks in advance!

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How do you calculate sec174?

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Formulas are below:

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I have the Casio fx-300MS and I cannot find the inverse button to find the angle of a right angle triangle

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How do input subscripts into a program with a TI-84 Plus? Like Y(sub 1)=y

Use the square brackets ("[" and "]"). They're the shifted functions of the multiply and subtract keys. For Y(sub 1) enter it as "Y[1]".

May 15, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

When I press a key in the column with vars, tan, ), 9, 6, 3, or (-), I only see a dash. All other keys work fine.

it could be that one of the application cause this or maybe the ram is full, if none of this help it could be an Hardware Failure
if you want to fix this problem let me know


Oct 18, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

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

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Regression line

okay this is easy but i'm doing it without a calculator infront of me in the upper right side of the calculator there is a button VARS hit it then i think you go right to function then hit enter then hit enter again. BEST OF LUCK

Nov 02, 2008 | Texas Instruments TI-84 Plus Calculator

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I don't have a Cot button but Cot x = 1/Tan x so enter

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I can not find the "Inv" button...

There is an inverse button below the math button, but if you hit second and the tan it should give you the inverse of tan. Hope this is what you wanted

Oct 24, 2007 | Texas Instruments TI-83 Plus Calculator

1 Answer


The TI-15 Explorer is for primary schools (low grades). If you know about trigonometry that is not the calculator that you need.

Look for any SCIENTIFIC calculator (the cheapest you can find at a dollar store ) will do the job.

Hope it helps.

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