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May 02, 2026, 08:37:08 pm
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Author Topic: Volume question  (Read 1632 times)  Share 

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mathsbrain

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Volume question
« on: June 09, 2017, 12:42:13 pm »
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Hi, I am not sure what ive done wrong but i was thinking part (i) should be (3-x) in the integral not (1-x)?
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RuiAce

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Re: Volume question
« Reply #1 on: June 09, 2017, 01:27:30 pm »
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« Last Edit: June 09, 2017, 02:03:24 pm by RuiAce »
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mathsbrain

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Re: Volume question
« Reply #2 on: June 09, 2017, 02:33:39 pm »
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isn't the height just y=2-cos^2(x)=2-((cos2x+1)/2)?
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RuiAce

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Re: Volume question
« Reply #3 on: June 09, 2017, 03:03:16 pm »
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Quote from: mathsbrain on June 09, 2017, 02:33:39 pm
isn't the height just y=2-cos^2(x)=2-((cos2x+1)/2)?


« Last Edit: June 09, 2017, 03:07:00 pm by RuiAce »
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mathsbrain

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Re: Volume question
« Reply #4 on: June 09, 2017, 04:34:47 pm »
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if you read the question, it says the region bounded by the curve AND the x-axis, which does not refer to the area pointed to by the arrow?
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RuiAce

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Re: Volume question
« Reply #5 on: June 09, 2017, 08:43:29 pm »
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No. Re-read the question carefully.

The area bounded by the x-axis is used to make the mould for the fish pond. The actual fish pond itself is what's being indicated by the arrow.
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mathsbrain

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Re: Volume question
« Reply #6 on: June 10, 2017, 12:15:15 am »
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oh haha...need to improve my linguistics...thanks so much!
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