[Blindmath] Unit Circle

[Salisbury, Justin Mark]

Hi Jill,

   That circular geoboard that I showed you can help with the quadrants and many angles.  In order to find a product that will fit your daughter's needs, you'll need to know which angles she'll need on the tool.  There are infinitely many angles in every circle, and no fixed solid device is going to hold all angle measurements.  Once she comes to understand the concept of the basic trigonometric functions (such as sine, cosine, and tangent) with a simple tactile device, such as the circular geoboard, she should be able to calculate any angle measurement she needs.  The point of this course is not to memorize too many angle measurements; your daughter will be learning how to calculate angle measurements from coordinates and coordinates from angle measurements.  

    If you wish to give her a table of some of the trig functions for some of the most commonly used values, anyone fluent in Braille can transcribe that for her from a visual table, which is guaranteed to exist in the standard textbook if the students will need it.  Again, I think that the function of these tactile models will really be to teach her the concept of what she is doing and what it means.

Good luck!

Justin



Justin M. Salisbury
Undergraduate Student
The University Honors Program
East Carolina University
salisburyj08 at students.ecu.edu

"It is the mark of an educated mind to be able to entertain a thought without accepting it."    -Aristotle
________________________________________
From: blindmath-bounces at nfbnet.org [blindmath-bounces at nfbnet.org] on behalf of Brad and Jill Weatherd [snowedin at union-tel.com]
Sent: Sunday, December 12, 2010 8:44 PM
To: 'Blind Math list for those interested in mathematics'
Subject: Re: [Blindmath] Unit Circle

Hi Justin and others,
Thanks so much for responding so quickly!  She just needs either a Brailled
and raised line unit circle showing the 4 quadrants, the angles, the
degrees, and radians or even a table that includes that information would be
great.  I'm thinking I could make some kind of a table, but I'm pretty
math-impaired so that might not be such a good idea.  Got any ideas?  Thanks
again, Jill

-----Original Message-----
From: blindmath-bounces at nfbnet.org [mailto:blindmath-bounces at nfbnet.org] On
Behalf Of Salisbury, Justin Mark
Sent: Saturday, December 11, 2010 6:50 PM
To: Blind Math list for those interested in mathematics
Subject: Re: [Blindmath] Unit Circle

Hi Joel,

    I am a mathematics major and am very familiar with said unit circle.
The equation x^2 + y^2 = 1 is the correct equation for it.  Are you looking
for an accessible version of one such as a raised-line drawing of a unit
circle, or were you merely looking for the information on what the unit
circle is?

Good luck!

Justin

Justin M. Salisbury
Undergraduate Student
The University Honors Program
East Carolina University
salisburyj08 at students.ecu.edu

"It is the mark of an educated mind to be able to entertain a thought
without accepting it."    -Aristotle
________________________________________
From: blindmath-bounces at nfbnet.org [blindmath-bounces at nfbnet.org] on behalf
of Sina Bahram [sbahram at nc.rr.com]
Sent: Saturday, December 11, 2010 8:01 PM
To: 'Nelson Blachman'; 'Blind Math list for those interested in mathematics'
Subject: Re: [Blindmath] Unit Circle

This might help explain what he's looking for.

http://www.mathsisfun.com/geometry/unit-circle.html

Take care,
Sina

-----Original Message-----
From: blindmath-bounces at nfbnet.org [mailto:blindmath-bounces at nfbnet.org] On
Behalf Of Nelson Blachman
Sent: Saturday, December 11, 2010 7:06 PM
To: Blind Math list for those interested in mathematics
Subject: Re: [Blindmath] Unit Circle

  The only unit circles I know are any circle whose radius is 1 or else the
circle whose center is at the origin (0,0) and has equation
x^2 + y^2 = 1.

  Nelson
----- Original Message -----
From: "Brad and Jill Weatherd" <snowedin at union-tel.com>
To: <blindmath at nfbnet.org>
Sent: Saturday, December 11, 2010 2:59 PM
Subject: [Blindmath] Unit Circle


> Hi Everyone,
>
> My daughter needs some accessible version of the Unit Circle for her
> senior Trig/pre-calculus class.  Does anyone have any idea where we
> can get our hands on something like this?  Even something in table
> form might work.
> Thanks so much for any help!  Jill Weatherd, Wyoming
>
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