Degree Entry in Radians Mode

[b***@hotmail.com]

Getting pretty good at the 50g, but one thing puzzles me: how to
enter an angle in degrees while I'm in radians mode to have it
automatically convert. This is possible on the Voyage 200 by just
entering the "degree" symbol. When I try this in my 50g, it reports
"invalid Syntax" and highlights the degree symbol.

Mode: RPN

Example (in Radians mode):

Enter complex number 5 <angle>20 degrees
(5, < 20°)

"Invalid Syntax"

Of course, if I change to degrees mode and enter (5 < 20) it works
fine, but if I'm in Radians, can I enter an angle in degrees and have
it automatically convert to radians?

I read the manual for fun, but maybe in the 900 pages I missed it
somehow.

Thanks,

Scott

[Veli-Pekka Nousiainen]

Post by b***@hotmail.com
Getting pretty good at the 50g, but one thing puzzles me: how to
enter an angle in degrees while I'm in radians mode to have it
automatically convert. This is possible on the Voyage 200 by just
entering the "degree" symbol. When I try this in my 50g, it reports
"invalid Syntax" and highlights the degree symbol.
Mode: RPN
Enter complex number 5 <angle>20 degrees
(5, < 20°)
"Invalid Syntax"
Of course, if I change to degrees mode and enter (5 < 20) it works
fine, but if I'm in Radians, can I enter an angle in degrees and have
it automatically convert to radians?
I read the manual for fun, but maybe in the 900 pages I missed it
somehow.
Thanks,
Scott

Leave out the degrees units,
unfortunately no units are supportred in the Polar Mode

You may also optionally leave the comma out

[Scott]

Hi Scott,

Try this:

'p/180' '°' STO

Now any angle in degrees times the unit ° will convert automatically
to radians, and will evaluate properly in radian mode.

For example, enter 'sin(25·°)' in radian mode, and ->NUM to get a
value.

Best regards,

Scott Guth

[Scott]

In the message above the 'p/180' expression is 'pi/180' where pi is
replaced by the pi symbol on the HP50G.

Regards,
Scott

Post by Scott
Hi Scott,
'p/180' '°' STO
Now any angle in degrees times the unit ° will convert automatically
to radians, and will evaluate properly in radian mode.
For example, enter 'sin(25·°)' in radian mode, and ->NUM to get a
value.
Best regards,
Scott Guth

[Scott]

Hi Scott,

Try this:

Enter 'pi/180' '°' STO

where 'pi' should be replaced with the Greek letter pi on the HP50G.

Now enter any angle in degree mode times ° to convert to radians.

For example,

'sin(75·°)' ->NUM will give the correct answer in radian mode.

Have fun,

Scott Guth

[Stefano Priore]

Post by Scott
Hi Scott,
Enter 'pi/180' '°' STO
where 'pi' should be replaced with the Greek letter pi on the HP50G.
Now enter any angle in degree mode times ° to convert to radians.
For example,
'sin(75·°)' ->NUM will give the correct answer in radian mode.

There is no need reiventing the wheel, because this trick is already
built in the HP thanks to the units system - remove the '°' variable
if you have created it and try these:

45_°
30_arcmin
15_arcsec
+ + SIN

or

\pi 4 /
1_rad *
COS

and also

100_grad
TAN

The answer will always be correct, regardless the degree mode the calc
is in.

[b***@hotmail.com]

On 26 Sep 2006 02:21:49 -0700, "Stefano Priore"

Post by Stefano Priore

Post by Scott
Hi Scott,
Enter 'pi/180' '°' STO
where 'pi' should be replaced with the Greek letter pi on the HP50G.
Now enter any angle in degree mode times ° to convert to radians.
For example,
'sin(75·°)' ->NUM will give the correct answer in radian mode.

There is no need reiventing the wheel, because this trick is already
built in the HP thanks to the units system - remove the '°' variable
45_°
30_arcmin
15_arcsec
+ + SIN
or
\pi 4 /
1_rad *
COS
and also
100_grad
TAN
The answer will always be correct, regardless the degree mode the calc
is in.

Oh, I get it--it's a UNIT. Thanks so much,
Scott

[b***@hotmail.com]

Post by Stefano Priore
There is no need reiventing the wheel, because this trick is already
built in the HP thanks to the units system - remove the '°' variable
45_°
30_arcmin
15_arcsec
+ + SIN
or
\pi 4 /
1_rad *
COS
and also
100_grad
TAN
The answer will always be correct, regardless the degree mode the calc
is in.

Oh, sorry--that doesn't work. If I enter a complex number as (5 <
30_°) I get an error at the "angle" symbol. If I put 5 and 30_° on
the stack and execute R\->C, I get an error (which makes sense,
actually).

I'll try the "variable" approach and see if that gives me a meaningful
result.

--Scott

[John H Meyers]

If I enter a complex number as (5 \<) 30_°)
I get an error at the "angle" symbol.

Complex-number objects can have only real components (no units);
complex-valued algebraic *expressions* can contain units,
but angle units won't be recognized as such, because there is
no "polar syntax" format for *algebraic" complex-valued expressions.

'5.*EXP(i*30._\^o)' doesn't seem to get far, either
(but keep trying with CAS commands, e.g. SINCOS gets somewhere,
but \->NUM can't then handle the superfluous 'EXP(0_\^o)' factor).

Things which *do* work are:

(5. \<) 30.) where "30" is interpreted in current angle mode only.

30._\^o [with "degrees" symbol] followed by RAD SIN ==> 0.5

The following accepts *two* inputs in polar coordinates
and produces the correct complex number object,
assuming degrees for the angle, regardless of current modes:

\<< RCLF UNROT -19 SF CYLIN DEG \->V2 SWAP STOF \>>

[r->] [OFF]

[b***@hotmail.com]

I think I'll create a "TakeOver" program that toggles the mode between
DEG and RAD. Then, when I'm in the edit line, I can just hit a key
combo to change to DEG, enter my Polar Coordinate, and then change
back to RAD after I hit "Enter."

--Scott

[Veli-Pekka Nousiainen]

Post by b***@hotmail.com
I think I'll create a "TakeOver" program that toggles the mode between
DEG and RAD. Then, when I'm in the edit line, I can just hit a key
combo to change to DEG, enter my Polar Coordinate, and then change
back to RAD after I hit "Enter."

OR
You could have the flag/mode setting commands in
STARTED & EXITED

[b***@hotmail.com]

On Fri, 29 Sep 2006 08:55:06 +0300, "Veli-Pekka Nousiainen"

Post by Veli-Pekka Nousiainen

Post by b***@hotmail.com
I think I'll create a "TakeOver" program that toggles the mode between
DEG and RAD. Then, when I'm in the edit line, I can just hit a key
combo to change to DEG, enter my Polar Coordinate, and then change
back to RAD after I hit "Enter."

OR
You could have the flag/mode setting commands in
STARTED & EXITED

Oh, very good. I forgot about those. With a TakeOver (user key)
approach, though, I could dynamically change the mode while still in
the edit line, rather than only one value while the Started and Exited
programs ran.

Good reminder, thanks,
Scott

[David Combs]

Post by b***@hotmail.com
On Fri, 29 Sep 2006 08:55:06 +0300, "Veli-Pekka Nousiainen"

Post by Veli-Pekka Nousiainen

Post by b***@hotmail.com
I think I'll create a "TakeOver" program that toggles the mode between
DEG and RAD. Then, when I'm in the edit line, I can just hit a key
combo to change to DEG, enter my Polar Coordinate, and then change
back to RAD after I hit "Enter."

OR
You could have the flag/mode setting commands in
STARTED & EXITED

Oh, very good. I forgot about those. With a TakeOver (user key)
approach, though, I could dynamically change the mode while still in
the edit line, rather than only one value while the Started and Exited
programs ran.
Good reminder, thanks,
Scott

What's a "TakeOver" approach?

What's this STARTED & EXITED?

Thanks,

David

[Veli-Pekka Nousiainen]

Post by David Combs

Post by b***@hotmail.com
On Fri, 29 Sep 2006 08:55:06 +0300, "Veli-Pekka Nousiainen"

Post by Veli-Pekka Nousiainen

Post by b***@hotmail.com
I think I'll create a "TakeOver" program that toggles the mode between
DEG and RAD. Then, when I'm in the edit line, I can just hit a key
combo to change to DEG, enter my Polar Coordinate, and then change
back to RAD after I hit "Enter."

OR
You could have the flag/mode setting commands in
STARTED & EXITED

Oh, very good. I forgot about those. With a TakeOver (user key)
approach, though, I could dynamically change the mode while still in
the edit line, rather than only one value while the Started and Exited
programs ran.
Good reminder, thanks,
Scott

What's a "TakeOver" approach?

TakeOver means that a Userkey will execute even in command line
(eg. to change mode etc)

Post by David Combs
What's this STARTED & EXITED?

START_EDitor is executed when text editing start
You could change to full screen by
0 ->HEADER

EXIT_EDitor is executed when you exit the text (program) editor
I suggest
2 ->HEADER

Post by David Combs
Thanks,

You're welcoome

Post by David Combs
David

Brother-Peter

[David Combs]

Post by Veli-Pekka Nousiainen

Post by David Combs
What's a "TakeOver" approach?

TakeOver means that a Userkey will execute even in command line
(eg. to change mode etc)

Ah, like that key works in "immediate mode"?

(same thing?)

Post by Veli-Pekka Nousiainen

Post by David Combs
What's this STARTED & EXITED?

START_EDitor is executed when text editing start
You could change to full screen by
0 ->HEADER
EXIT_EDitor is executed when you exit the text (program) editor
I suggest
2 ->HEADER

Post by David Combs
Thanks,

You're welcoome

Post by David Combs
David

Brother-Peter

[Veli-Pekka Nousiainen]

Post by David Combs

Post by Veli-Pekka Nousiainen

Post by David Combs
What's a "TakeOver" approach?

TakeOver means that a Userkey will execute even in command line
(eg. to change mode etc)

Ah, like that key works in "immediate mode"?

Yes - you can think it as a temporary immediade mode key
Think it like pressing [NXT] during numeric command line input

[b***@hotmail.com]

Post by b***@hotmail.com
Getting pretty good at the 50g, but one thing puzzles me: how to
enter an angle in degrees while I'm in radians mode to have it
automatically convert. This is possible on the Voyage 200 by just
entering the "degree" symbol. When I try this in my 50g, it reports
"invalid Syntax" and highlights the degree symbol.
Mode: RPN
Enter complex number 5 <angle>20 degrees
(5, < 20°)
"Invalid Syntax"
Of course, if I change to degrees mode and enter (5 < 20) it works
fine, but if I'm in Radians, can I enter an angle in degrees and have
it automatically convert to radians?
I read the manual for fun, but maybe in the 900 pages I missed it
somehow.
Thanks,
Scott

Solution for me: Didn't have to write anything--just added ::
TakeOver x~ANG ; to a key assignment (from the OT49 library). Perfect.
I'm going to assign RECT/CYLIN/SPHERE now.

Thanks,
Scott

[b***@hotmail.com]

Post by b***@hotmail.com
Getting pretty good at the 50g, but one thing puzzles me: how to
enter an angle in degrees while I'm in radians mode to have it
automatically convert. This is possible on the Voyage 200 by just
entering the "degree" symbol. When I try this in my 50g, it reports
"invalid Syntax" and highlights the degree symbol.
Mode: RPN
Enter complex number 5 <angle>20 degrees
(5, < 20°)
"Invalid Syntax"
Of course, if I change to degrees mode and enter (5 < 20) it works
fine, but if I'm in Radians, can I enter an angle in degrees and have
it automatically convert to radians?
I read the manual for fun, but maybe in the 900 pages I missed it
somehow.
Thanks,
Scott

BTW, it turns out that one can change the modes WHILE being in the
edit line.