Question about Casio FX-115ES Scientific Calculator

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Where is the 2nd F key, to find the size of θ (to the nearest degree) where θ is acute. example question: sin θ = 0·259

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The key is called SHIFT on Casio calculators. To get the arcsine of an angle you press [SHIFT][SIN], then enter the angle measure in the appropriate unit (degree in your case) and press ENTER. Your result should be 15.01073397 or 15, to nearest degree.

Posted on Sep 06, 2010

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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

https://education.ti.com/en/us/guidebook/details/en/ADF11FB65B284B6195B0A7E9502784BA/baiiplus

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

1 Answer

Sin 43 degrees 30'


Press SIN 4 3 2ND [ANGLE] 1 3 0 2ND [ANGLE] 2 ENTER

2ND [ANGLE] 1 gives you the degrees symbol, 2ND [ANGLE] 2 gives you the minutes symbol. If you need seconds, use ALPHA ["] (on the + key).

Note that this usually won't give you an EXACT value, but only a ten-digit approximation.

Dec 05, 2012 | Texas Instruments TI-84 Plus Calculator

1 Answer

How do i work out the Sin, Cos, and Tan on the TI-83 plus?


First, make sure you have the appropriate angular mode set. To change the angular mode, press MODE, use the arrow keys to highlight either "RADIAN" or "DEGREE" on the third line, press ENTER, then press 2ND [QUIT].

Press the appropriate sin, cos, or tan key (two rows above the 7, 8, and 9 keys), enter the angle, close the parenthesis, and press ENTER. For example, to calculate the sin of 2.1, press
SIN 2 . 1 ) ENTER

Jun 07, 2011 | Texas Instruments TI-83 Plus Calculator

1 Answer

I have a IITI-30XIIS and I am trying to calculate the angle of impact of blood spatter for a science fair project. The formula is sin to the -1st power (width/length). I can't figure out how to put...


To set the calculator to degrees, press DRG and select DEG.
To calculate the arcsin, press 2nd SIN followed by the value of the sine. For example, if the width is 3 and the length is 5, press 2nd SIN 3 / 5 ) ENTER.

Jan 12, 2011 | Texas Instruments TI-86 Calculator

1 Answer

How do I find inverse sine, cosine and tangent in degrees


First, make sure the calculator is set to degrees (2nd [FORMAT] down-arrow).

Put in the value, press INV, the appropriate function key, and =.

For example, to find the inverse sine of .3, press
. 3 INV [SIN] =

Dec 03, 2010 | Texas Instruments BA-II 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

2 Answers

How do you use the sin-1


You would press on the SIN key, "sin(" should come on the display, then enter the value, for example 3.5 or -1 so that the display shows

sin(3,5) or sin(-1) for example.

remember to close the sin with the ) on the end.
sin(-1) = -0.841470985

Feb 16, 2010 | Texas Instruments TI-30XA Calculator

1 Answer

Trig Functions and Angles


What is wrong? Are you not getting the right answers? If so, your calculator is set on radian, not degree.

May 03, 2009 | Texas Instruments TI-34II Explorer Plus...

16 Answers

Need help withe the sin, cos, tan problem with ti - 83 plus


here are the steps in changing it from radian to degrees
1. turn on your TI-83 plus
2. press the MODE button near the top of your calculator
3.go down to options and move the highlight from radian to degree, press enter and clear
you're good to go

Feb 17, 2007 | Texas Instruments TI-83 Plus Calculator

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