HOW TO CONVERT DEGREES MINUTES SECONDS TO DECIMAL DEGREES IN HP 50G

[VLS43]

Equation: How to write and equation that includes SIN of 10 degrees 25 minutes 15 seconds to Decimal Degrees (10.4208 degrees. OR convert 10.4208 degrees back to 10 degrees 25 minutes 15 seconds.

[banhien]

Hi,

Which application (or tool) are you using ?

Regards.

[BartdB]

Hi,

In Algebraic Mode:

Simply enter:

SIN(HMS->(10.2515))

(HMS-> is found in the TIME menu - red RightShift 9, NXT or scroll down; or red RightShift 9, 4. Tools, NXT or scroll down)

In RPN mode this is not so easy because internally the command is not flagged as being able to be put into an albegraic expression (but it works in Algebraic mode? - go figure!).

So in RPN mode you can create your own function as a program:

<<  HMS->  >>

and store as e.g. 'DDG'

Now you can write an equation as:

'SIN(DDG(10.2515))'                 (note for DDG you have to add the brackets yourself, white LeftShift  –   )

and press EVAL

Best regards

[VLS43]

Thanks for your help. The first i have found in dealing with this problem. The problem in RPN is the (time and tools is not available when entering an equation. It looks like it is in algebraic it may be available for direct entry.

Then there is solving the equation for the angle and having it appear in DMS not decimal DEG.

Thanks

I have been converting the angle DMS to Decimal Deg (using time & tools) then storing it as an variable, the equation then uses the converted angle to provide correct information. Then use time & tools to back to DMS.

Thanks for your help.

[BartdB]

Hi,

When using the Equation Writer, you can also find commands in the CAT menu ( red rightshift SYMB ) or you can manually type them in using alpha letters too.

However, for the numeric equation solver, you can trick RPN mode into accepting HMS-> and ->HMS as follows:

create a program:

<<  `B=->HMS(ACOS(SIN(HMS->(A))))`  >>                     (note: you will have to enter the brackets manually)

Note: ` is a slanted apostrophe, obtained by press and hold  Red RightShift ( ) and '  ( ).

Save this program as e.g. 'EQ1'

Open the numeric solver and for "Eq:" select CHOOS then select EQ1. It should show the program equation and variables A and B. You can enter data and solve for variables as normal.

Best regards.

EDIT: you can actually write this program directly in the editor of the Solver without first creating EQ1.