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Converting Radians to Degrees in Maple 9

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SPAWN OF A JEWISH CARPENTER: CINDY SMITH

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Aug 24, 2003, 4:06:41 PM8/24/03
to
I just bought Maple 9 the other day and have noticed that it returns
answers in radians instead of degrees. So, evalf(sin(90)); returns
the answer 0.89399666 etc. instead of 1. I've search the Learning
Guide and the Help file on Maple but cannot figure out how to change
from radians to degrees. If someone knows how, would you please
enlighten me? Thanks.

--

Cindy Smith Unless the LORD build the house,
c...@dragon.com they labor in vain who build.
c...@5sc.net Unless the LORD guard the city,
c...@romancatholic.org in vain does the guard keep watch.
Me transmitte sursum, -- Psalm 127:1
Caledoni! All your base are belong to us.
A Real Live Catholic You are on the way to destruction.
in Georgia! What you say.
>->> <<-< Go against the flow! You have no chance to survive make your time.

G. A. Edgar

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Aug 24, 2003, 4:50:17 PM8/24/03
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In article <TVhPrT...@vega.star-nets.net>, SPAWN OF A JEWISH

CARPENTER: CINDY SMITH <c...@vega.star-nets.net> wrote:

> I just bought Maple 9 the other day and have noticed that it returns
> answers in radians instead of degrees. So, evalf(sin(90)); returns
> the answer 0.89399666 etc. instead of 1. I've search the Learning
> Guide and the Help file on Maple but cannot figure out how to change
> from radians to degrees. If someone knows how, would you please
> enlighten me? Thanks.

If d = measure of an angle in degrees, and r = measure of the same
angle in radians, then d=(180/Pi)*r or r=(Pi/180)*d .

So, for example, sin(90 degrees) = sin((Pi/180)*90) = sin(Pi/2)

--
G. A. Edgar http://www.math.ohio-state.edu/~edgar/

SPAWN OF A JEWISH CARPENTER: CINDY SMITH

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Aug 24, 2003, 5:40:01 PM8/24/03
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In article <240820031650176028%ydp4f...@sneakemail.com>,

Okay, that works. Basic trig. Is there any way to make degrees the
default instead of radians? That's what I'm trying to figure out.

Thanks again very much.

> --

> G. A. Edgar

http://www.math.ohio-state.edu/~edgar/

--

Robert Israel

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Aug 24, 2003, 8:19:23 PM8/24/03
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In article <ShR0Gc...@vega.star-nets.net>,

SPAWN OF A JEWISH CARPENTER: CINDY SMITH <c...@vega.star-nets.net> wrote:
|>In article <240820031650176028%ydp4f...@sneakemail.com>,
|>"G. A. Edgar" <ydp4f...@sneakemail.com> writes:

|>> If d = measure of an angle in degrees, and r = measure of the same
|>> angle in radians, then d=(180/Pi)*r or r=(Pi/180)*d .

|>> So, for example, sin(90 degrees) = sin((Pi/180)*90) = sin(Pi/2)

|>Okay, that works. Basic trig. Is there any way to make degrees the
|>default instead of radians?

Not really. But you can define your own functions, for example

> Sin:= x -> sin(Pi/180*x);

Robert Israel isr...@math.ubc.ca
Department of Mathematics http://www.math.ubc.ca/~israel
University of British Columbia
Vancouver, BC, Canada V6T 1Z2


Julian V. Noble

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Aug 27, 2003, 2:23:43 PM8/27/03
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Conversions are fairly easy:

> convert(3.14159,units,radians, degrees);
179.9998479

Look under Help, units.

--
Julian V. Noble
Professor Emeritus of Physics
j...@lessspamformother.virginia.edu
^^^^^^^^^^^^^^^^^^
http://galileo.phys.virginia.edu/~jvn/

"Science knows only one commandment: contribute to science."
-- Bertolt Brecht, "Galileo".

SPAWN OF A JEWISH CARPENTER: CINDY SMITH

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Aug 28, 2003, 10:58:04 AM8/28/03
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In article <3F4CF72F...@virginia.edu>, "Julian V. Noble"
<j...@virginia.edu> writes:

> SPAWN OF A JEWISH CARPENTER: CINDY SMITH wrote:

>> I just bought Maple 9 the other day and have noticed that it returns
>> answers in radians instead of degrees. So, evalf(sin(90)); returns
>> the answer 0.89399666 etc. instead of 1. I've search the Learning
>> Guide and the Help file on Maple but cannot figure out how to change
>> from radians to degrees. If someone knows how, would you please
>> enlighten me? Thanks.

>> --

>> Cindy Smith Unless the LORD build the house,
>> c...@dragon.com they labor in vain who build.
>> c...@5sc.net Unless the LORD guard the city,
>> c...@romancatholic.org in vain does the guard keep watch.
>> Me transmitte sursum, -- Psalm 127:1
>> Caledoni! All your base are belong to us.
>> A Real Live Catholic You are on the way to destruction.
>> in Georgia! What you say.
>> >->> <<-< Go against the flow! You have no chance to survive make your time.

> Conversions are fairly easy:

>> convert(3.14159,units,radians, degrees);
> 179.9998479

> Look under Help, units.

Thank you very much. I'm just getting used to the package and didn't
know what command to look for in help. convert (Pi/2, units, radians,
degrees); gives "90."

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