how to get answers in terms of pi on a calculator

Change it to degrees

but I need the answer in radians in terms of pi

How are you obtaining the radians on your calculator??

Some fairly simple rational coefficients of $\pi$ can be obtained and shown; i.e. $\dfrac{7\pi}{2} + \dfrac{4\pi}{3} = \dfrac{29\pi}{6}$

but others might be too much for a calculator; i.e. $\dfrac{11\pi}{59} + \dfrac{28\pi}{13} = 7.35222...$. 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.

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)

But $\arctan(45)$ is not $\dfrac{\pi}{2}$. Why would it come up as that?

in radians it is

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

But it's not...

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

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)

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

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.

yeah I tried it but it didn't work

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

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

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.