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# The Soc for People of 'GRDCT2008' Mk VI watch

1. (Original post by GHOSH-5)
Does there exist a number x such that both cosx = -1 and sinx = 1?

Archededge: there are various ways to do it, such as calculus. Alternatively, write 12cosx - 4sinx in the form Rcos(x+a), where R and a are constants to be found. Hence the minimum of 12cosx - 4sinx will be the minimum of Rcos(x+a) which is -R, and this occurs for x+a = pi.

In my world, yes.....I can also divide by 0 without terrible consequences
*Thats probably where my C3 went wrong today*
2. (Original post by jaz_jaz)
yup resit tomorrow!
going through my textbook now lol.
terrified of unit 3 though! I find it SO hard!
OMG i know right?!
Srsly they could have warned us.
That's what made me decide on the retake!

eek eek. I have to do it in the morning too cos of stupid stats :|
3. (Original post by raceforthefishman)
In my world, yes.....I can also divide by 0 without terrible consequences
You'll go to Hell for that.
Spoiler:
Show
4. Ghosh
5. (Original post by GHOSH-5)
You'll go to Hell for that.
Spoiler:
Show
What is is not to be a mathematician

6. D1 - worst. module. everrrr.
7. (Original post by John Locke)
D1 - worst. module. everrrr.
Exam today?
Or just general nastiness?
8. (Original post by raceforthefishman)
Exam today?
Or just general nastiness?
nah, the exams on friday. it's pretty woeful in general as well.

i spend 15mins trying to understand where i went wrong on a question, only to eventually realise that i had got it right in the first place. hate my life.
9. I still don't understand why something x 0 = 0
never have
never will
10. (Original post by lozz2601)
I still don't understand why something x 0 = 0
never have
never will
Because if you have something 0 times then you have 0

Like 5 x 2 is saying you have two 5s added together
and 3 x 4 is three 4s added together

well if you had 5 x 0 you have no fives added together and hence nothing

11. (Original post by raceforthefishman)
Because if you have something 0 times then you have 0

Like 5 x 2 is saying you have two 5s added together
and 3 x 4 is three 4s added together

well if you had 5 x 0 you have no fives added together and hence nothing

But
like if you have five sweets and you x by zero
you don't multiply them by anything
so they stay the same!!
(i know its wrong mathematically i just dont think it makes common sense sense )
12. (Original post by lozz2601)
I still don't understand why something x 0 = 0
never have
never will
Sketchy proof from axioms:

1 = 1 and hence 1 - 1 = 0. a = a and hence a - a = 0.

But a - a = a(1 - 1) = a0. Hence a0 = 0.
13. (Original post by lozz2601)
But
like if you have five sweets and you x by zero
you don't multiply them by anything
so they stay the same!!
(i know its wrong mathematically i just dont think it makes common sense sense )
Well its like you've got 5 there fair enough...but then you've got 5 no times over...so overall you have nothing

I can see the confusion...I wasn't sure with dividing by 0 for a very long time

5(now you see it) x 0 (oh noes) = 0 (it disappeared)
14. (Original post by raceforthefishman)
Well its like you've got 5 there fair enough...but then you've got 5 no times over...so overall you have nothing

I can see the confusion...I wasn't sure with dividing by 0 for a very long time

5(now you see it) x 0 (oh noes) = 0 (it disappeared)
I thought you were a scientist, even I noes things don't disappear
15. (Original post by lozz2601)
I thought you were a scientist, even I noes things don't disappear
Its magic
16. URGHHH
tyre puncture
17. (Original post by GHOSH-5)
Sketchy proof from axioms:

1 = 1 and hence 1 - 1 = 0. a = a and hence a - a = 0.

But a - a = a(1 - 1) = a0. Hence a0 = 0.
this proof is nice i understand it
18. (Original post by overclocked)
URGHHH
tyre puncture
Oh no
Thats not going to be cheap for a new tyre
I need a new spare atm
19. :e

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