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    Re: TI-36X Pro degrees minutes seconds conversion
    From: David C
    Date: 2017 Feb 5, 17:01 -0800
    > TI could have done better by having a dedicated button to make the 
    conversion rather than scrolling through menus :(

    I have an fx-82AU. It saves memory locations when the power is turned off but does not save expressions. It is back to school time and when I noticed that a local retailer had the fx9750G11 on special I considered buying one. My first step was to download the User manual. I discovered that the fx9750 is not designed for easy use of sexagesimal arithmetic. To enter DMS and convert between DMS and decimal degress requires a convoluted use of menus.

    Contrast that with the fx-82AU where a single .,,, button performs those functions. The cosine formulas for Hc and t are easy to remember. I have decided that easy entry/manipulation of sexagesimal numbers is more important than saving expressions on power off.

    I use the following convention with memory locations:

    A lat

    B dec

    C t

    D Ho

    and can very quickly enter the Hc or the t formula.

    The local retailer has the fx-82AU on sale for < NZ$ 20. They also have an  H + O Technology 82ES for < NZ$ 12. Looking at the keys the H + O appears to be a near clone of the fx-82AU and would probably be adequate for cellnav. Most importantly it has the .,,, button and at least four memories.

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