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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
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