Question about HP 15C Scientific Calculator
Try to fix a formula calculation on my HP-15C, which is in the book mention like this: sin 55 x Cos 45 x 1 x1 x 1 = 0.5792 how do i have to enter the values into calculater, enable to reach this result. Have try many different ways but just dont get it. Help highly appreciated
Press g [DEG] 5 5 SIN 4 5 COS * 1 * 1 * 1 *
I don't know why you need the three multiplies by 1. This could be done as 5 5 SIN 4 5 COS *
Posted on Sep 03, 2013
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Posted on Jan 02, 2017
You should get a USB cable.
If you do not want to, get a Secure Digital card (formatted in FAT). Turn calculator ON, Insert card in slot.
Then [LeftShift][FILES] Open the directory where files are. Select them and use the [Copy] soft key to copy files. Got to directory where you want them copied and Copy rhem there. Exit File Manager. Remove Card and insert in SD card slot in computer, etc.
If you install the latest ROM 2.15 (hpcalc.org) the USB transfer option in IO parameters will show.
Hope it helps
Posted on Sep 10, 2009
SOURCE: HP 15C calculator display showed
When you get the error press any key to suppress the error message. Put the calculator into PROGRAM mode and you will see the line where the error occurred.
Here is what the manual says for ERROR 4 (free translation)
The line number called is not used or does not exist (larger than 448); attempt to load a program line (instruction) where there is not enough space; line label inexistant.
My hunch is that you are attempting to divide by 0: The quantity of which you are taking the reciprocal (inverse function has another meaning) may have a 0 value.
Do not forget to check the input values.
Hope that will help you debug your program
Posted on Oct 14, 2009
If the keyboard test fails the calculator should be sent for repairs. One shop in Pennsylvania repairs most models, except the newer ones. The URL is www.fixthatcalc.com. Best of luck!
Posted on Jan 30, 2010
Enter than angle as 32.2010 then press left-shift [->HR] to convert to decimal degrees.
The ->HR function (and the companion ->H.MS are for working in hours-minutes-seconds, but they work just as well for degrees-minutes-seconds.
Posted on Nov 04, 2010
Tips for a great answer:
SEC, CSC & COT are the INVERSE of COS, SIN & TAN and are usually require hitting the "2nd F" or "Func" key of the calc to make:
SIN button work as COSEC,
COS button work as SEC
TAN button work as COT
Formulas are below:
sec x = 1
cosec x = 1
cot x = 1 = cos x
tan x sin x
Feb 05, 2013 | Sharp EL531 Scientific Calculator
Let's start with a little background.
The cot(x) is also known as the cotangent(x) and it equals 1/tan(x) which equals cos(x)/sin(x). I'm showing these formulas because your calculator may not have a cot button but it will probably have buttons for tan, cos, and sin.
Your calculator may also have buttons for tan-1, cos-1 and sin-1. These are the inverse functions for tan, cos, and sin. If you enter a number and then push the tan-1 button, the result is the angle whose tangent is the entered number. For example, it you enter 1 and push the tan-1 button the answer will be 45 deg because tan (45 deg) = 1.
Now let's look at the problem, cot(x) = -0.6.
The first thing we need to know is do you want the answer in degrees or radians? Your calculator will have both modes. The default mode when you first turn it on is probably degrees. If this problem is in radians you will need to change the mode of your calculator over to radians before we start.
If cot(x) = -0.6, then tan(x) = 1/-0.6 from the formula I showed in the background section.
This means tan(x) = -1.6666666...
Now we just enter -1.66666667 and hit the tan-1 button to get the answer.
If we're operating in radians the answer is -1.0307 radians.
If we're operating in degrees the answer is -59.036 deg.
I hope this helps you out.
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