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What button do I press to get radians? - Casio FX-115ES Scientific Calculator

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Press [SHIFT][MODE] to access (SETUP)
Press the number corresponding to RAD.

Posted on May 13, 2010

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Ti-nspire cx CAS gives answer in degrees even though it is in radians mode.


When you set some configuration parameter you must scroll down the setup until you reach the OK button. Press the OK button to validate.

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When i type in a trig function to graph, the mode is set to radians but the calculator continues to use degrees. How do I make it graph using radians on the x-axis?


The calculator OS (the latest version) has 2 angle settings: Graphing angle and geometry angle.
In Graph mode, Press the menu button, then select Settings, set graphing angle to radians.
Here are some screen captures to help you.
Be sure to validate your changes by pressing OK

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Hi, can you tell me how I can make a simple program so I can change the Nspire to degree or radian mode without having to go through Settings etc etc? My students frequently make mistakes because it is...


No need for such a program. You can specify the angle unit for a calculation regradless of the angle unit currently set as default.
For the TI Nspire with Touchpad.
Calculate the sine of 30 degrees.
Press the trig> button next to = on the left side of keyboard.
Select sin and press ENTER
Type in 30
Press the key with the question/Exclamation marks.
Use right arrow to highlight the degree symbol.
Press ENTER. No need to close parenthesis.
The answer is displayed as 0.5.

To enter an angle in radian (regardless of the angle unit set as default.
Do as above to type in the function
Type in the angle.
Press the small button marked with Pi and arrow (To the left under the EE button)
Use the arrow to highlight the small superscript r.
Press ENTER


For TI Nspire with ClickPad
Press the trigonometric function key.
Enter the angle
Press the key with infinity symbol, beta, degree (below the Clear button.
At the top of the list where the Pi symbol is you will find the degree,radian, and gradian symbols.
Append the one you want and and press ENTER.

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1 Answer

Sin cos tan


To use these functions press the sin, cos, or tan button followed by the angle you are looking for the value for if in degree mode or the radian value your are looking for if in radian mode.

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1 Answer

Whenever i put in sin or cos or tan on my calculator the wrong answer comes up, how do i fix this?


Most likely you do have the calculator in radians (or if you are working in radians, you have it in degrees). Press the mode button, move cruser down to "radians degrees" highlight degrees. and press "2nd quit". things sould be better!

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1 Answer

Don't know how to change it from degrees to radian mode


if you press the |mode| button (at the top right of the calculator) until you see Deg Rad Gra on the screen (I believe 3 presses of the mode button) and just hit the number below the rad option on the display. This will permanently change it to radian mode until you repeat this step, or clear the memory.

There is also a way to change to radian mode for just one operation if you will be mostly using degrees for example

at the bottom there is a DRG> as a shifted function. I would just recommend changing it in the way I initially outlined as there is less room for error when making calculations.

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Press the MODE button to enter the Mode menu, and change the angular measure to suit.

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MODE > then scroll to Angle... and change to Radian.

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