dylanm
Can someone explain to me how it is possible to determine an answer for this question?
http://i.imgur.com/ahpPs.jpg
The waterslide one, I've had a go at it but there simply does not seem to be enough information (equations etc) to get answers. Any ideas?
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jasonxx
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are you talking about 16?
dylanm
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The one underneath, Analysis Question 1.
jasonxx
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use tan theta= h1/ 5
jasonxx
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and \[h1= \sqrt {l^2-25}\]
dylanm
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In order to use trig, you need an angle, but there is no angle listed in this question.
jasonxx
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coordinate of A is (16,0)
dylanm
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The answer section in the back of the book states it is (15,0)
jasonxx
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hmm...wait a sec
jasonxx
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how come this cubic equation has got two roots only??
jasonxx
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let's say coordinate of A is (x1,0)...your cubic function will be (x-0)(x-8)(x-x1)
jasonxx
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but at x=0 value of cubic function is h1
jasonxx
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so the function is (x-h1)(x-5)(x-x1)
jasonxx
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now i am realising ...this question is really a good one :)
jasonxx
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@lgbasallote where are you...come here ..have some fun
lgbasallote
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someone called?
jasonxx
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yea me....check out the question and help to figure this out ...please
lgbasallote
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sorry. i hate math...i have no idea
jasonxx
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well i had been seeing that...you have solved mathematics for most of the time ...but it's fine....if you don't wanna get in to this
lgbasallote
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i seriously do not have any idea. i'm just a primary school student.
jasonxx
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cool...