# how to get answers in terms of pi on a calculator

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im doing radians and my calculator is still in the radians mode but all the answers are coming up as decimals and I cant change them to pi. anyone have any ideas what I could do? I have a casio fx-83gt plus if that helps.

thanks !!

thanks !!

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but I need the answer in radians in terms of pi

(Original post by

Change it to degrees

**Cov3rt**)Change it to degrees

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#4

(Original post by

but I need the answer in radians in terms of pi

**emiuk**)but I need the answer in radians in terms of pi

Some fairly simple rational coefficients of can be obtained and shown; i.e.

but others might be too much for a calculator; i.e. . But this is not that much of a problem. Just ignore pi and do "11/59 + 28/13" first and that will give you the fraction. Then include pi alongside it, job done.

Also when doing something like inverse cosine of a number, you're not always going to get a multiple of pi for your calculator to show, so don't expect it every time.

Last edited by RDKGames; 2 years ago

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I'm getting the radians because it's in the radians mode. Thanks for this, but I was more specifically looking to see if there was another mode I could change it to since this one for some reason suddenly stopped working (for example tan-1(45) will come up as 1.54857.... instead of pi/2 as it used to)

(Original post by

How are you obtaining the radians on your calculator??

Some fairly simple rational coefficients of can be obtained and shown; i.e.

but others might be too much for a calculator; i.e. . But this is not that much of a problem. Just ignore pi and do "11/59 + 28/13" first and that will give you the fraction. Then include pi alongside it, job done.

Also when doing something like inverse cosine of a number, you're not always going to get a multiple of pi for your calculator to show, so don't expect it every time.

**RDKGames**)How are you obtaining the radians on your calculator??

Some fairly simple rational coefficients of can be obtained and shown; i.e.

but others might be too much for a calculator; i.e. . But this is not that much of a problem. Just ignore pi and do "11/59 + 28/13" first and that will give you the fraction. Then include pi alongside it, job done.

Also when doing something like inverse cosine of a number, you're not always going to get a multiple of pi for your calculator to show, so don't expect it every time.

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#7

(Original post by

I'm getting the radians because it's in the radians mode. Thanks for this, but I was more specifically looking to see if there was another mode I could change it to since this one for some reason suddenly stopped working (for example tan-1(45) will come up as 1.54857.... instead of pi/2 as it used to)

**emiuk**)I'm getting the radians because it's in the radians mode. Thanks for this, but I was more specifically looking to see if there was another mode I could change it to since this one for some reason suddenly stopped working (for example tan-1(45) will come up as 1.54857.... instead of pi/2 as it used to)

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in radians it is

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#9

(Original post by

in radians it is

**emiuk**)in radians it is

The answer is something 'close' to pi/2, but it's not exactly pi/2

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thanks !!

(Original post by

just divide the answer by pi. if you get 0.3 then the answer was 0.3pi

**the bear**)just divide the answer by pi. if you get 0.3 then the answer was 0.3pi

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ok but for the questions on my exam when it asks to find an angle giving the the answer in pi i need the pi form

(Original post by

But it's not...

The answer is something 'close' to pi/2, but it's not exactly pi/2

**RDKGames**)But it's not...

The answer is something 'close' to pi/2, but it's not exactly pi/2

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#12

**emiuk**)

I'm getting the radians because it's in the radians mode. Thanks for this, but I was more specifically looking to see if there was another mode I could change it to since this one for some reason suddenly stopped working (for example tan-1(45) will come up as 1.54857.... instead of pi/2 as it used to)

*shift, 9, 3, =, AC*

and then change back to the radians mode via your setup, if there is any problem, this should hopefully fix it if it is displaying unexpected results.

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#13

(Original post by

ok but for the questions on my exam when it asks to find an angle giving the the answer in pi i need the pi form

**emiuk**)ok but for the questions on my exam when it asks to find an angle giving the the answer in pi i need the pi form

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yeah I tried it but it didn't work

(Original post by

Try resetting your calculator completely:

*shift, 9, 3, =, AC*

and then change back to the radians mode via your setup, if there is any problem, this should hopefully fix it if it is displaying unexpected results.

**Strelzo**)Try resetting your calculator completely:

*shift, 9, 3, =, AC*

and then change back to the radians mode via your setup, if there is any problem, this should hopefully fix it if it is displaying unexpected results.

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#15

(Original post by

yeah I tried it but it didn't work

**emiuk**)yeah I tried it but it didn't work

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#16

(Original post by

Then those angles will be simple ones, definitely not something where you need to know or write arctan(45).

**RDKGames**)Then those angles will be simple ones, definitely not something where you need to know or write arctan(45).

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but I do need it.... for example a question is:

solve the equation of cot^2 x + cosec^2 x=7 giving all the solutions in the interval 0 ≤ x ≤ 2pi in terms of pi

and that comes to √1/3 =tanx I have worked out so far...

(Original post by

Then those angles will be simple ones, definitely not something where you need to know or write arctan(45).

solve the equation of cot^2 x + cosec^2 x=7 giving all the solutions in the interval 0 ≤ x ≤ 2pi in terms of pi

and that comes to √1/3 =tanx I have worked out so far...

**RDKGames**)

Then those angles will be simple ones, definitely not something where you need to know or write arctan(45).

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ive been looking for the past half an hour but found nothing useful :/

this happened to me with a different calculator a few days ago as well and after an hour or so it went back to showing pi. it's really reassuring to go into an exam knowing my calculator could f me over

this happened to me with a different calculator a few days ago as well and after an hour or so it went back to showing pi. it's really reassuring to go into an exam knowing my calculator could f me over

(Original post by

Hmm, perhaps look online to see if there's another solution to your problem?I thought for sure that'd work, as it works for me whenever I have a calculator problem.

**Strelzo**)Hmm, perhaps look online to see if there's another solution to your problem?I thought for sure that'd work, as it works for me whenever I have a calculator problem.

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#19

a) It does not reduce to entirely.

b) Still not sure where you are pulling arctan(45) from, unless I'm misinterpreting what you're trying to say.

b) Still not sure where you are pulling arctan(45) from, unless I'm misinterpreting what you're trying to say.

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1) I used decimals to see if I was going in the right direction using 1/√3= tan x and I got all the angles right (I checked by converting the answer into decimals). I did this to check that I was doing the right method, but I still cant get the answers in pi form

2) it was just an example because it's what I used for one of the last ones where my calculator showed the answer in pi

(Original post by

2) it was just an example because it's what I used for one of the last ones where my calculator showed the answer in pi

(Original post by

**RDKGames**)
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