# What is the cosine of 38 degrees? - Casio FX-300MS Calculator

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Hi,

Welcome to Fixya. The Cosine of 38 degrees is 0.788010754

If you have questions please let me know. Thanks for using Fixya.

Posted on Apr 07, 2011

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Posted on Jan 02, 2017

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## Related Questions:

### Sin, cos,tan don't work. For example, I click 1, 2nd and cos and I'm getting 1 instead of 0.54. In all other buttons the 2nd function is working but not for sin, cos, tan. Thanks for any help!

I wonder if your calculator is set to the wrong units. Your calculator can be set to degrees, radians, or gradians. I assume that you want it set to degrees.

When I click 1 2nd and cos, I will always get 0, because using the 2nd before the cos turns the function into cos^-1 (inverse cosine). The inverse cosine of 1 is 0 because the cosine of 0 is 1.

Good luck.

Let me know if you have any further questions.

Paul

Dec 20, 2015 | Texas Instruments BA II PLUS Financial...

### Inverse cos of 52 degrees

The cosine of 52 degrees is about .6157 . The inverse cosine of .6157 is 52 degrees.

52 degrees is a measure of an angle. .6157 is a distance. The cosine of an angle results in a distance, while the inverse cosine of a distance results in an angle. There is no such thing as the inverse cosine of an angle, just as there is no such thing as the cosine of a distance. It's like asking "How heavy is one hour?"

If you're asking how to calculate a cosine or inverse cosine on your calculator, please specify the make and model of the calculator.

Jan 08, 2013 | Office Equipment & Supplies

### My Ti-89 is not giving the right answer for cosine. I typed in the cos(42) and it gave me -.39985 when it is supposed to be posotive .74314. Does anyone know what is wrong?

Nothing's wrong, your calculator is giving you the cosine of 42 radians. If you want the cosine of 42 degrees (which is 0.74314), press MODE, down-arrow to the "Angle" line, press right-arrow, select "2:DEGREE", and press ENTER twice.

Dec 13, 2012 | Texas Instruments TI-89 Calculator

### HOW DO I CHANGE THE COSINE BACK TO THE ANGLE

To get the angle from a value of the cosine, you use the arc cosine or arcosin function. It is the shifted function of the cosine key. Be careful with the units. If the calculator is configured with the degree angle unit, the value returned by the arc cosine will be in degrees. If the angle unit is the radian, the result will be in radians.

Nov 26, 2012 | Casio FX83ES Scientific Calculator

### I can't seem to be able to figure out how to find the cosine tangent or sine of an angle...Help?

Unlike traditional calculators, the FX9750G uses textbook order to call functions. For example, to calculate the sine of 45°, you key in (angle argument unit set to degrees assumed):

[sin] 45 [EXE]

Cosine and tangent are analogous. Argument format can be degrees, radians or grad. You can set up the angle argument unit by keying in:

[SHIFT] [SETUP] [v] [v] [v] [v] and then
• [F1] (Deg) [EXIT] for degrees (1 full circle = 360°),
• [F3] (Grad) [EXIT] for grad (1 full circle = 400 gon).

Jan 07, 2011 | Casio FX9750GII Graphic Calculator

### My TI-83 plus say Cos(180) =-.598.. What is wrong?

Nothing's wrong with your calculator. The cosine of 180 radians is -.598...

If you want the cosine of 180 degrees, set the calculator's angle mode to degrees by pressing the MODE button, moving down to the third line, and selecting "Degree".

Oct 29, 2010 | Texas Instruments TI-83 Plus Calculator

### How to use a calculator to convert 0.5 to a cosine angle

Let su rephrase the question, just to be sure we are on the same wavelength. The cosine of an angle is 0.5: What is the value of the angle? Right?.

First of all you must set the angle unit to degree or radian.
1. Press [SHIFT][MODE\ and select the appropriate unit.
2. Press [SHIFT][COS] to access the arc cosine function (COS^-1) enter 0.5, close the right parenthesis and hit [=]
If you unit is the degree you should find 60 degrees.
If the angle unit is the radian, the result should be 1.045 radian.

Mar 10, 2010 | Casio FX-115ES Scientific Calculator

### My ti30x will not do cos-1 when i type it in i get domain error

The cosine function takes its value on the whole real line, the angle domain spans ]-infinity, + infinity[. The range of the function is however limited to the [-1, +1] interval.
Thus if you want to calculate the arc (angle) from the value of the cosine, the cosine must be in the interval [-1, +1]. Any value outside this domain will give you a domain error.
Check that the values you feed to the arc cosine function are in the interval [-1,+1].

If the angle unit is the degree the value returned bay [cos^-1] is in degrees, and if the angle unit is the radian, the value returned is in radians

Mar 04, 2010 | Texas Instruments TI-89 Calculator

### My casio calculator cfx is coming up with 'syn error' everytime I type in a sine cosin or tangent problem

Hello,
I believe you are not pressing the keys in the right order.
If you know how to set angle unit, skip this part and go to Exemples

If you want to calculate the sine , cosine or tangent of an angle given in degrees, the calculator must have the angle unit set to degrees. To do so :Turn calculator ON, scroll to [RUN] icon and press [EXE] then [SHIFT][SETUP]. On the fifth line angle must be set Degrees. If it is not in degrees, press the key correspondig to menu deg (F1)
(If you have to use the Radian as unit of angle, that is where you set it.)
So your angle is in degrees.
Exemples
To calculate the sine of 15 degrees press [SIN] 15 [EXE].
If expression inside the sine is complicated or contains diverse operations use parentheses as in the exemple
[SIN] [(] 90/2 -180/3 [)] [EXE].
You proceed the same way for cosine, or tangent.

Hope it helps.

Aug 31, 2009 | Casio CFX 9850GB Plus Calculator

### Using Tan,sin, cosin

Alot of people seem to be having this problem. Angles can be measured in two units, degrees and radians. Your calculator is currently doing everything in terms of radians. I have an 84 but I'm sure the 83 is similar, go under MODE and look for Degrees and Radians and make sure you choose degrees. if you have to convert 360[degrees] = 2* pi [radians]
(easy to remember, 360deg in a circle, 2pi radians in a circle)
Good luck

Aug 11, 2009 | Texas Instruments TI-83 Plus Calculator

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