Can't switch my calculator from degrees to radians... help?

Re: degrees to radians

Press "2ND" "MODE" to enter the mode screen. Press down-arrow twice to get to the angular mode. Press right-arrow or left-arrow to highlight the desired angular mode, then press "ENTER" to select it. Exit the mode screen by pressing "2ND" "QUIT"

Posted on Jan 17, 2010

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

Good luck.

Paul

Apr 01, 2014 | Sharp el-531x scientific calculator

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**

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

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

Press SHIFT MODE and then 3 for degrees or 4 for radians.

Nov 29, 2012 | Casio fx-115ES Plus Scientific Calculator

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 [1, infinity). So, to put this in basic math terms: all six trig functions have ANGLE INPUTS (degrees & radians) while spitting out SIDE-RATIO OUTPUTS (for instance, the height of the tree in relation to the distance away from it).

2. DEGREE MODE: All the TI calculators I've ever used have a way to switch between RADIAN mode & DEGREE mode. If you're taking pre-calc or trigonometry I'd suggest staying in degree mode; if you're taking Calculus or more advanced mathematics then I'd seriously suggest sticking with radian mode. Either way, go to your MODE screen and toggle it to the desired setting. ALSO, if you're graphing a trig function then you will want to be in radian mode.

Now...to try to answer your question:

A. You are either asking to find the ARCSECANT of -1.2.

OR

B. You are asking to find the SECANT of -1.2 radians.

A. TI-84 does not have a SECANT button (from what I remember); because the reciprocal trig functions aren't as important as sine, cosine, and tangent. This isn't bad news. All you need to do to find the arcsecant (aka the inverse secant) of a value is find the arccosine of that value [arccos(-1.2)] and find its reciprocal (ie, flip the number upside down: the reciprocal of 5 is one-fifth). Viola, you're done.

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) . Viola, you're done.

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.com

In 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.

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 [1, infinity). So, to put this in basic math terms: all six trig functions have ANGLE INPUTS (degrees & radians) while spitting out SIDE-RATIO OUTPUTS (for instance, the height of the tree in relation to the distance away from it).

2. DEGREE MODE: All the TI calculators I've ever used have a way to switch between RADIAN mode & DEGREE mode. If you're taking pre-calc or trigonometry I'd suggest staying in degree mode; if you're taking Calculus or more advanced mathematics then I'd seriously suggest sticking with radian mode. Either way, go to your MODE screen and toggle it to the desired setting. ALSO, if you're graphing a trig function then you will want to be in radian mode.

Now...to try to answer your question:

A. You are either asking to find the ARCSECANT of -1.2.

OR

B. You are asking to find the SECANT of -1.2 radians.

A. TI-84 does not have a SECANT button (from what I remember); because the reciprocal trig functions aren't as important as sine, cosine, and tangent. This isn't bad news. All you need to do to find the arcsecant (aka the inverse secant) of a value is find the arccosine of that value [arccos(-1.2)] and find its reciprocal (ie, flip the number upside down: the reciprocal of 5 is one-fifth). Viola, you're done.

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) . Viola, you're done.

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.com

In 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

Press SHIFT MODE then 3 for degree or 4 for radian.

Dec 04, 2010 | Casio FX-115ES Scientific Calculator

Press SHIFT MODE to access (SETUP)

Press 3:deg for degree OR

press 4:Rad for radian.

Press 3:deg for degree OR

press 4:Rad for radian.

Apr 02, 2010 | Casio FX-115ES Scientific Calculator

Hello,

With the TI8x/TI8xPlus you can enter an angle in degrees (Angle mode must be set to degrees) and convert it into DMS representation the following way. Exemple

18.675 [2nd][ANGLE][4] [ENTER] gives 18deg 40' 30''

If Angle [MODE] is set to degrees you can enter a number in radians and convert it into degrees. Exemple How many degrees are ther in 1rad ?

[1][2nd][ANGLE][3] display 1 with a small r as superscrit. Pressing [ENTER] yields 57.29577951

To convert 1rad into DMS, takes a little effort but can be done: you have

to convert radians to degrees and the result [ANS] into DMS.

You cannot use an angle written in DMS in any calculation.

But if you want to convert an angle from degrees to radians enter your number and divide by 57.29577951

Hope it helps

With the TI8x/TI8xPlus you can enter an angle in degrees (Angle mode must be set to degrees) and convert it into DMS representation the following way. Exemple

18.675 [2nd][ANGLE][4] [ENTER] gives 18deg 40' 30''

If Angle [MODE] is set to degrees you can enter a number in radians and convert it into degrees. Exemple How many degrees are ther in 1rad ?

[1][2nd][ANGLE][3] display 1 with a small r as superscrit. Pressing [ENTER] yields 57.29577951

To convert 1rad into DMS, takes a little effort but can be done: you have

to convert radians to degrees and the result [ANS] into DMS.

You cannot use an angle written in DMS in any calculation.

But if you want to convert an angle from degrees to radians enter your number and divide by 57.29577951

Hope it helps

Sep 02, 2009 | Texas Instruments TI-84 Plus Calculator

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

(easy to remember, 360deg in a circle, 2pi radians in a circle)

Good luck

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

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

(easy to remember, 360deg in a circle, 2pi radians in a circle)

Good luck

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

reset ur calculator. press 2nd 6 F1 3 Enter. Note that all your data will be gone

Jun 07, 2008 | Texas Instruments TI-89 Calculator

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