Iron Edge

Iron Edge => Off Topic Discussion => Topic started by: Archz on September 14, 2009, 06:21:40 pm

Title: Math help!
Post by: Archz on September 14, 2009, 06:21:40 pm

Since we have some bright minds in the guild, using the forum for help have actually been of great help!

And I am in need for some help, so here goes:

"
Let a > 0 be a real number

Show that the equation x = cos(ax) has a solution in the interval [0 , pi/2a].
(remember to name the mathematical theorem) <- (?)
"

I have some silly solutions that involve giving "a" a value, and then using the ..cutting theorem?

But I don't think that's good enough.

Any other ideas?

Title: Re: Math help!
Post by: Ino on September 14, 2009, 06:47:56 pm

Does http://en.wikipedia.org/wiki/Intermediate_value_theorem help? I think it might :\.

Title: Re: Math help!
Post by: delling on September 14, 2009, 06:49:02 pm

40% (lowest pass mark) on my university maths paper and PROUD!

Title: Re: Math help!
Post by: Goza on September 14, 2009, 07:19:13 pm

Math. LOL!

Title: Re: Math help!
Post by: Ino on September 14, 2009, 07:26:21 pm

Quote from: Goza on September 14, 2009, 07:19:13 pm

Math. LOL!

I bet you know the answer.

Title: Re: Math help!
Post by: Daekesh on September 14, 2009, 07:29:25 pm

Work it backwards, tbh.

Title: Re: Math help!
Post by: Wicca on September 21, 2009, 11:22:54 pm

Was there a diagram with this? :D