Question about Texas Instruments TI-Nspire CX CAS Handheld Color Graphing Calculator with Computer Algebra System
When I switch between radian and degree modes I get the same answer. I know how to switch modes no problem, yet when I ask it to solve say arctan (2/3), it gives me the same answer for both radian and degrees. I make sure after each time that it is on each setting. What could be wrong with my calculator?
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Posted on Jan 02, 2017
SOURCE: Hi, can you tell
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.
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.
Posted on Sep 07, 2011
There are no dedicated keys for these trigonometric functions, for the simple reason that they can be obtained from the tan, sin, and cos by a simple division.
cotangent (x) =1/tan(x) . Do not confuse with the arc tangent tan^(-1)
cosecant (x) = 1/sin(x) . Do not confuse with the arcsine sin^(-1)
secant(x) =1/cos(x) Do not confuse with the arccosine cos^(-10)
If you know how to use the tan, cos, and sin, with angle unit in degrees or radians, then there will not be any problem
If angle unit is degree, any number you give a trigonometric function is interpreted as degree. For instance if mode is in degree , and you calculate cos(PI) do not expect the value -1. You will have the value corresponding to the cosine of of 3.14159 degrees, namely 0.99849715
Now for you if you are interested.
If [MODE] is in degrees you can still enter angles in radians
You use the [2nd][ANGLE] [3: raised r] [ENTeR].
Here is a screen capture to show you more clearly.
The raised r is obtained by [2nd][ANGLE][3: raised r] [ENTER]
Hope it helps.
Posted on Oct 14, 2009
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