Radians and Degrees

[Kim]

I have been able to force the calculator to calculate sine of and angle in either radians or degrees using the degree symbols and the radian symbol in both radian and degree mode.  I can convert a decimal into degrees minutes and seconds using the degree symbol on the decimal in either mode.  Why can't I take an angle in degrees minutes and seconds and get a decimal approximation when the calculator is in radian mode.  For that type of operation I have to change the settings of the calculator.  Seems kind of odd since every other operation I have tried will let me override the mode by putting in a symbol.  I have tried grouping the DMS with parentheses, but that doesn't work either.

My students also asked me why there wasn't an angle menu.  I have a mix of 84s and Nspires.  The 84 has a place for angles so they assumed the Nspire should as well.

[Sean Bird]

See the attached image for some tips.

You can find the @>DMS in the catalog.

- Sean Bird

Covenant Christian High School

Indianapolis, IN

[Dennis Williams]

How can you change to degrees if you have an angle measure in radians (while in radian mode)

Thanks

[alcoonslists]

• If in radian mode you can do a calc in degrees by adding the degree symbol after the radian value (ctrl-catalog)
• If in degree mode you can do a calc in radians by adding the "r" symbol after the angle value (ctrl-catalog)

Al Coons

Department of Mathematics

Buckingham Browne & Nichols

Cambridge, MA

AP Statistics Site: http://www.bbn-school.org/us/math/ap_stats/

On Feb 9, 2012, at 3:32 PM, Dennis Williams wrote:

How can you change to degrees if you have an angle measure in radians (while in radian mode)

Thanks

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[Sean Bird]

Besides knowing that pi=180 degrees
you could use the TI-Nspire by doing for example
pi/2 @>DD