cancel

Note on archived topics.

This topic has been archived. Information and links in this thread may no longer be available or relevant.
If you have a question create a new topic by clicking here and select the appropriate board.
Pmudge Honor Student
Honor Student
2 1 0 0
Message 1 of 5
495
Flag Post
HP Recommended

Output is off (wrong answers)

I have input and re-input this equation several times and my answer for F(0) ends up '1' as should but for F(.5) is .606507564884. There was an earlier equation that I input earlier that came up with a different answer than expected. If anyone can tell me what is messing up my answer I would appreciate it.

 

 

 

HP50g Question 1.jpg

0 Kudos
4 REPLIES 4
Distinguished Professor
Distinguished Professor
3,739 3,443 175 526
Message 2 of 5
479
Flag Post
HP Recommended

Output is off (wrong answers)

Hi!, Pmudge:

 

Welcome, to Forum !.

 

Can you please, write the equation, for your HP50G ?.

 

I'm didn't view, the image ... HP50g Question_1.jpg

Only see, one light yellow equilateral triangle, with border's gray.

Kind Regards !.
Have a nice day !.
@Maké (Technical Advisor Premium - HP Program Top Contributor).
Provost in HP Spanish Public Forum ... https://h30467.www3.hp.com/
0 Kudos
Pmudge Honor Student
Honor Student
2 1 0 0
Message 3 of 5
462
Flag Post
HP Recommended

Output is off (wrong answers)

Hi, thanks for responding. 

 

The equation is:

 

F(X)=cos(x)/e^x

 

 

My input in RS EQW is "AS F LS ( ) X RA RS = COS X RA ÷ LS eX X ENTER"

 

And then "Now press LS DEF to define the function. If you look at your variables, (press VAR if necessary), you will see that the left most soft menu label is now F. To evaluate this function for any particular value of X put the value of X in the command line or on level 1 of the stack and 2 press F1-F. For example F(0) = 1 and F(.5) = .532280730215. To see what this function looks like after it has been defined, press RS F1-F. "

 

The HP equation is "<< → X 'COS(X)/EXP(X)' >> "

 

When I enter .5 and then F1 it spits out .606507564884.

0 Kudos
Distinguished Professor
Distinguished Professor
3,739 3,443 175 526
Message 4 of 5
450
Flag Post
HP Recommended

Output is off (wrong answers)

Hi!, Pmudge:

 

Please, see, the images ... 

 

F_6.PNG

 

F_0.PNGF_2.PNGF_1.PNGF_4.PNGF_3.PNGF_5.PNG

 

 

 

 

Kind Regards !.
Have a nice day !.
@Maké (Technical Advisor Premium - HP Program Top Contributor).
Provost in HP Spanish Public Forum ... https://h30467.www3.hp.com/
0 Kudos
PhD Student
PhD Student
507 491 79 147
Message 5 of 5
425
Flag Post
HP Recommended

Output is off (wrong answers)

The problem you're seeing is caused by your 50g being in the wrong angle mode:

 

COS(.5)/EXP(.5) = 0.532280730215 in RADIAN mode

COS(.5)/EXP(.5) = 0.606507564884 in DEGREE mode

 

Hope that helps!

 

Disclaimer: I don't work for HP. I'm just another happy HP calculator user.

-Joe-
0 Kudos

Note on archived topics.

This topic has been archived. Information and links in this thread may no longer be available or relevant.
If you have a question create a new topic by clicking here and select the appropriate board.
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation