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Haha don't worry I noticed it. It just took me a while to draw the solution up

n cannot be found in this question unless another condition is given (eg. when t = 2, x = 4, v = 8 [I made up the numbers]). It's only then we can sub a as well as v and x back into the v2 equation and find n

*hi5* 3unitz

Just equal to 0

Wrong The tangent exists if and only if the discriminant is equal to 0

Right

Part a x = a sin (nt + @) v = an cos (nt + @) v2 = a2 . n2 (1 - sin2 [nt + @]) v2 = a2 . n2 (1 - [x2 / a2]) v2 = n2 (a2 - x2) When v = 0, x = -5 0 = n2 (a2 - 25) Since n2 cannot be 0, a2 = 25 Therefore a = 5 Therefore x = 5 sin (nt + @) and v = 5n cos (nt + @) When t = 0, v = 0, x = -5 -5 =...

Wrong O may not necessarily lie on AE, as ABE may not necessarily be a right angle in other cases

Not necessarily

This is suppose to be a simple question but I can't see the way to get the answer From Fitzpatrick 27. AB and AC are equal chords of a circle. AD and BE are parallel chords through A and B respectively. Prove that AE is parallel to CD Basically: - the blue lines are equal - the orange lines...

My Math teacher always tells us f''(x) = 0 is necessary but not sufficient proof for a point of inflexion. It must also change in concavity. In this case, yes it does change in concavity but f''(x) does not equal to 0. Therefore there is no point of inflexion

Does this really incorporate 4U material?

In Maths, you should take g = 10, otherwise stated

No way. Look at page 2. It has heaps of things people would do if they knew.

It comes down to possibilites for me. If it is possible to reach such an advanced stage, then its possible to make many. I tried not to bring the multiverse into this, but i guess i have to. I'll make it simpler this way. For one advanced universe there are many fake ones. Therefore out of the...

If your not fussed about the nature of your existence then that's fine, though that is rare for humans not to be curious about our existence.

2. This is a whole new topic thats way too llong to get into now, but its fair to say again to agree to disagree. 4. Quatum computin is extremely complex but the crux of the idea is that its power is far greater than usual computin, and all the possibilities needed to find out cures for cancer...

I'll get that with a PS3 as soon as the HSC is over

1. Of course we don't know if it's possible. Thats the only (major) thing standing in the way. 2. Humanity wont destroy itself. We are overall becomin more civilised and the countries with power are not as bad as the fanatics. 3. Sorry, i missed the point originally, though I know now. I don't...