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May 13, 2026, 09:53:40 pm
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Author Topic: CAS help!!  (Read 1236 times)  Share 

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jashaan

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CAS help!!
« on: January 02, 2020, 12:14:46 pm »
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I want exact values to show up on the x axis when I am graphing trig functions, however I am not sure how to do that on the cas. Please help me out :))
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Tau

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Re: CAS help!!
« Reply #1 on: January 02, 2020, 12:20:40 pm »
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Quote from: jashaan on January 02, 2020, 12:14:46 pm
I want exact values to show up on the x axis when I am graphing trig functions, however I am not sure how to do that on the cas. Please help me out :))

Assuming you’re using the TI-nSpire, then it’s not possible by default. IIRC there might’ve been some clunky workaround, but it wouldn’t be worth the time.

What I would recommend is to change the scale and min and max values for the axes to match your trig function so it is easier to identify key points. You can do that from Menu > 4 > 1, I think.
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jashaan

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Re: CAS help!!
« Reply #2 on: January 02, 2020, 12:24:41 pm »
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Quote from: Tau on January 02, 2020, 12:20:40 pm
Assuming you’re using the TI-nSpire, then it’s not possible by default. IIRC there might’ve been some clunky workaround, but it wouldn’t be worth the time.

What I would recommend is to change the scale and min and max values for the axes to match your trig function so it is easier to identify key points. You can do that from Menu > 4 > 1, I think.

Whoops! Sorry, I meant values in the form of pi, e.g. 5pi/12. I want to be able to identify that on the x axis
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TigerMum

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Re: CAS help!!
« Reply #3 on: January 02, 2020, 06:49:22 pm »
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I'm not entirely sure where you want to see these exact values, so I'll do my best here.
If you want those little lines on the x-axis to be in increments of pi or pi/2 rather than 1, you can double-click on that number 1 sitting just below the x-axis near the origin and type in pi or pi/2 (or whatever is convenient) and click enter. This should make it much easier to identify irrational key points, especially the x-axis intercepts.

If you want the co-ordinates that appear on the screen when using the trace function or when finding zeroes or intersection points to appear as exact values, there is a way to do it, except it's a bit annoying and not really helpful if you are trying to find some unknown non-integer value  and the other co-ordinate in the pair is either unknown or an integer. If this is what you are looking for, I can explain how to do this but its use is rather limited.
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