• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

Help...my teacher is killing me here...UPDATE

E

EngenZerO

Diamond Member
He claims that this equation has a root and wants us to write a computer program to solve this

sin(x+sqrt(1-x^2))-1.2x+2

My working program and my calculator says there are no roots, but he still claims that their are roots to this equation. Ideas?

update...The prof was on crack...he meant the equation to be sin(x+sqrt(1-x^2))-1.2x+0.2. What is funny, is that he didn't believe my calculator or my c++ program until he ran the question through his self written maple program. what a dick. either way, he had to push back the lab due to his error. thanks all

 
Originally posted by: pillage2001
LOL.....WTF???? Try plotting the equation and see if there's a root. What calculator do you have?
Click to expand...

Ti86 and no it shows no roots

what sucks even more is that this is a 30point problem, :|
 
Originally posted by: EngenZerO
Originally posted by: pillage2001
LOL.....WTF???? Try plotting the equation and see if there's a root. What calculator do you have?
Click to expand...

Ti86 and no it shows no roots
Click to expand...

As someone said, he plotted the graph and showed no roots. I guess, your Lab instructor is losing it.
 
My calc 3 instructor was writing a math book when i was in her class and she would assign problems that would go into the book.

On a couple of occasions people would come in pissed that they worked for hours on a problem and couldnt get it to work. She would then try it on the board for 5 mins and remark "Oh well, i guess that doesn't work, maby if you change the 5 to a 2...."

Would have been frustrating if i actualy did any homework.
 
On a couple of occasions people would come in pissed that they worked for hours on a problem and couldnt get it to work. She would then try it on the board for 5 mins and remark "Oh well, i guess that doesn't work, maby if you change the 5 to a 2...."
Click to expand...
bahahah
I've had that happen a lot.
 
the sqrt(1-x^2) is causing the formula to be bound to -1 <= x <= 1 for real numbers y.

any other value of x will give you an answer that depends on sin of x plus some imaginary number.

Pretty screwed up dude! Maybe the prof meant to make up some random formula and didn't notice the imaginary number problem.
 
1. What level is this math class? If Calc I or Pre-calc, then I'd have to say there's no real root (and you're not going to find any imaginary roots either)
2. I'm a calculus teacher, and the thought of solving for imaginary roots with that equation (if they even exist??) gives me a headache...

Are you sure you wrote the equation down correctly??
And, what's your teacher's last name? (this problem looks very familiar to one I had in a calculus lab years ago that had no solution... took me quite a while to convince the lab teacher... he's since not gotten tenure and moved on to a different university)
 
Originally posted by: dquan97
Draw a graph and explain your reasoning. Post the URL to the thread if it helps 😉
Click to expand...

Yeah if you've got the equation right, then do what dquan said. Sounds like he screwed up. Anybody in the lab you can ask?
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top