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November 08, 2025, 07:05:24 am
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Author Topic: heinemann textbook  (Read 2416 times)  Share 

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kdgamz

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heinemann textbook
« on: July 12, 2009, 05:19:38 pm »
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hey does anyone have heinemann specialist worked solutions?  could you please post them up cos im dead stuck on loads of questions.
I'd really appreciate it.
Thanks :)
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TrueTears

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Re: heinemann textbook
« Reply #1 on: July 12, 2009, 05:20:59 pm »
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Maybe post up some questions you can't do and it would benefit everybody.
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TonyHem

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Re: heinemann textbook
« Reply #2 on: July 12, 2009, 05:24:21 pm »
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Yeah post up the questions :), I haven't seen stuff from the Heinemann book before.
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kdgamz

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Re: heinemann textbook
« Reply #3 on: July 13, 2009, 10:00:12 am »
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the question is:

find the domain of the derivative of:

y= cos-1(2√(x))

the derivative is -1/(√(x-4x2) but i keep getting the domain wrong!

Thanks

btw..if any1 has the teacher CD or anything like that...could you post it up???

thanks again :)
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kdgamz

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Re: heinemann textbook
« Reply #4 on: July 13, 2009, 03:56:07 pm »
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i take it no one knows the answer????
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NE2000

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Re: heinemann textbook
« Reply #5 on: July 13, 2009, 04:13:52 pm »
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Quote from: kdgamz on July 13, 2009, 03:56:07 pm
i take it no one knows the answer????

Is it (0, 1/4) ? by any chance
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2009: English, Specialist Math, Mathematical Methods, Chemistry, Physics

hyperblade01

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Re: heinemann textbook
« Reply #6 on: July 13, 2009, 04:17:19 pm »
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It depends on the domain of the function and since its inverse trig graph, it has to be one-to-one

Find out the domain of the inverse cosine graph that makes it one-to-one and there you go






« Last Edit: July 13, 2009, 04:21:24 pm by hyperblade01 »
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2008: Accounting
2009: Chemistry, Biology, Methods CAS, Specialist, English Language
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kdgamz

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Re: heinemann textbook
« Reply #7 on: July 14, 2009, 09:08:35 am »
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yeh thats the answer, but isnt the domain of a inverse cosine graph [-1,1]???

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GerrySly

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Re: heinemann textbook
« Reply #8 on: July 14, 2009, 09:50:55 am »
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Quote from: kdgamz on July 14, 2009, 09:08:35 am
yeh thats the answer, but isnt the domain of a inverse cosine graph [-1,1]???
But you can't take the square root of a negative number over R
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VCE 2009
English, Methods, Specialist, IT: Software Development, Religion & Society, French

kdgamz

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Re: heinemann textbook
« Reply #9 on: July 14, 2009, 04:43:18 pm »
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oh yeh...thanks
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