Question about Sharp el-531x scientific calculator

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How do I get to degree mode instead of radian

I am using sine but my calculator is in radian mode and I need it to be in degree help please

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Hit the DRG key to the right of the pi key. It should cycle from radians to gradians to degrees. A "D" should appear at the top of your screen rather than the current "R".

Good luck.

Paul

Posted on Mar 26, 2015

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My calculator is not computing sin^-1 or cos^-1 correctly, I put sin^-1(0.184) in and it came out with 10.60283... when I should be getting 1.39. HALP?


When the angle unit is in radians
sin^-1(0.184)=0.1850543940 radians
When angle unit is in degrees
sin^-1(0.185)=10.60283581
Your calculator is calculating the functions correctly)
In the following screen captures the sine of the values is calculated with the unit specified inside the formula (degree symbol and radian symbol are inserted to show you the unit). In the last calculation the value of the sine is practically 0.184
Remember that when angle is in radians, for very small angles (less than 10 degrees), sin(x) and tan (x) are about equal to the value of the angle in radians

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Mar 25, 2014 | Casio FX-115ES Scientific Calculator

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How do I fix the sin on my calculator?


It depends on the unit of measurement. The sine of one radian is about 0.84. The sine of one degree is about 0.017. The sine of one grad is about 0.015. From your numbers it looks like your calculator is set to grads when you want it to be in radians (and are you sure you want a negative number for the sine of one?).

Press the DRG key to cycle through the angular modes. One of the annunciators at the top of the display will light to indicate the current mode.

Jan 31, 2014 | Sharp el-531x scientific calculator

1 Answer

Wrong trigonometric answers


The sine of 0.5 radians is about 0.4794, so your calculator seems to be giving you the correct answer in that case.

The sine of 0.5 degrees is about 0.00872, which your calculator may be displaying as something line 8.72 times ten to the negative 3. Look to the far right end of the number: do you see "x10-3" with the "-3" superscripted? In that case, again your calculator is giving you the correct answer.

Sep 10, 2012 | Casio FX-115ES Scientific Calculator

1 Answer

Sin(30)=


The sine of 30 radians is about -0.988 while the sine of 30 degrees is 0.5 .


To change the angular setting, press MODE, down-arrow to the "Radian Degree" line, highlight Degree, press ENTER, then 2nd QUIT to exit the mode screen.

Jul 26, 2012 | Texas Instruments TI-84 Plus Calculator

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Calculation errors


The sine of 90 radians is about 0.89, as your calculator shows. If you want the sine of 90 degrees, change the angular mode to degrees by pressing MODE, use the cursor keys to highlight "Degree" on the third line, press ENTER then 2nd QUIT.
You're calculating (8^1)/3 which is 2.6666667 . If you want the third root of 8, press 8 ^ ( 1 / 3 ) ENTER .

Apr 13, 2012 | Texas Instruments TI-83 Plus Calculator

1 Answer

Im trying to divide 12 by sin 60 and when i type it in my calculator i get -39.36870689 which is not the right answer. please help. Thanks !


That is the correct answer if the angle is 60 radians. If you want to work in degrees, press MODE to bring up the mode screen. Use the arrow keys to highlight "Degree", press ENTER, then 2nd QUIT to exit the mode screen. Now 12 divided by the sine of 60 degrees will give about 13.9.

Aug 22, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

I have to take the secant of -1.2. I'm supposed to get a degree. I can't figure out the order to push buttons. PLEASE help!


TWO THINGS YOU NEED TO KNOW, Eli.1. Secant will NEVER return a degree measure (or even a radian measure) no matter what computer or calculator you use. The reason is because secant returns the ratio of sides (hypotenuse over adjacent), which has a range of and find its reciprocal (ie, flip the number upside down: the reciprocal of 5 is one-fifth). That's all.B. TI-84 only uses the three basic trig functions. Secant is the reciprocal of cosine. Therefore, in order to find the secant of -1.2 radians you need to be in Radian mode (see #2 above). From there, you just find the cosine of -1.2 and take that values reciprocal (ie, flip the number upside down: the reciprocal of 10 is point one) . That's all. Math lesson: 1 Radian = 180 Degrees. Therefore, 1.2 Radians is roughly one-third of pi, therefore it is roughly one-third of 180 degrees; therefore -1.2 radians would be nearly -60 degrees (a very friendly angle measure). I hope that helps If not, you should call Texas Instruments because they've got friendly people who are happy to assist anyone. Questions like this are right up their ally, advanced questions like the syntax of the poisson cumulative distribution function are not. So, you're fine. For in depth math help holler at www.THEMATHCHEETAH.comIn Short: Secant returns ratios and NOT degrees or radians. Secant is the reciprocal to cosine. Arcsecant WILL return degrees/radians. Your calculator can be set to either mode.TEXAS INSTRUMENTS >>>>> all calculators ever made.

Mar 08, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

I need the sine of 5 degrees sin(5) in decimal form, how do I get the answer? when I hit enter it just gives me Sin(5).


Assuming you're in degrees mode instead of radians, press diamond then ENTER to convert a symbolic result to decimal.

This can be done in one step by using diamond ENTER instead of ENTER when first calculating the expression. For example:
2ND [SIN] 5 ) diamond ENTER

Sep 20, 2010 | Texas Instruments TI-89 Calculator

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On my TI 83 plus my sine cosine and tangent buttons are giving incorrect answers.


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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