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Algebra question

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Reply 60
Avatar for Zacken
Zacken
OP
22
Original post by Student403

Wow.. I'm gonna need to look that up. But how does that work without any units? And yeah those questions are brilliant. I think we had a 4 marker for that in Unit 4 physics in January :love:


No clue, they assign units to something and then do some wonky thing and I'm just like wtf wot.

Argh, lucky! :eek:
Original post by Zacken
No clue, they assign units to something and then do some wonky thing and I'm just like wtf wot.

Argh, lucky! :eek:

I'll get to that right after the chapter, then!
Reply 62
Avatar for Ayman!
Ayman!
15
Original post by Marxist
Mechanics > Pure... bite me. Lol jk, but this should be fun. @TeeEm


I will try this as well tomorrow, looks like good M3 prep


Original post by Zacken
Good luck, you'll do great! :biggrin: :woo:

I think you should make one, it'll be nice and it might even motivate you a little, there's certainly no harm to it, make it make make it! :biggrin:


thank you, zain. I'll put on my procrastination bucket for tomorrow :tongue:

Original post by Student403
From what I've studied so far, it seems so :rofl: Still you can sound cool when you tell all your Edexcel peasant mates about it :wink:


who you callin' "Edexcel peasant", Edexcel peasant? :colone:
Are we allowed to post Mechanics questions then?
Original post by aymanzayedmannan
I will try this as well tomorrow, looks like good M3 prep




thank you, zain. I'll put on my procrastination bucket for tomorrow :tongue:



who you callin' "Edexcel peasant", Edexcel peasant? :colone:


Fair point xD
Original post by aymanzayedmannan
I will try this as well tomorrow, looks like good M3 prep


You might like this too.
Capture.JPG61.0KB
Reply 66
Avatar for TeeEm
TeeEm
19
Original post by Marxist
Mechanics > Pure... bite me. Lol jk, but this should be fun. @TeeEm


I think I have seen this question in OCR ... quite clever
Original post by TeeEm
I think I have seen this question in OCR ... quite clever


OCR MEI, it's quite good, yes. :smile:
Reply 68
Avatar for Zacken
Zacken
OP
22
Here's a nice induction question, if you lot want to have a go at it:

Show that sin⁡2nx=sin⁡(2n+1)xcos⁡x−cos⁡(2n+1)xsin⁡x\displaystyle \sin 2nx = \sin (2n+1)x \cos x - \cos (2n+1)x\sin x

Hence, by induction, prove that:
Unparseable latex formula:

\displaystyle [br]\begin{equation*}\cos x + \cos 3x + \cos 5x + \cdots + \cos (2n-1)x = \frac{\sin 2nx}{2\sin x}



where
Unparseable latex formula:

\sin x \neq 0\end{equation*}

and n∈Nn \in \mathbb{N}

Solve cos⁡x+cos⁡3x=12,0<x<π\displaystyle \cos x + \cos 3x = \frac{1}{2}, 0 < x < \pi

Anybody want to have a go? :colone:
Original post by Zacken
No takers? What about this one:

If I place a point PP in a square QRSTQRST, what is the probability that the angle QPRQPR is acute?


e/π
Reply 70
Avatar for Zacken
Zacken
OP
22
Original post by the bear
e/π


Sure, just round off to get: e=8−πe = 8 - \pi
Original post by Zacken
Here's a nice induction question, if you lot want to have a go at it:

Show that sin⁡2nx=sin⁡(2n+1)xcos⁡x−cos⁡(2n+1)xsin⁡x\displaystyle \sin 2nx = \sin (2n+1)x \cos x - \cos (2n+1)x\sin x

Hence, by induction, prove that:
Unparseable latex formula:

\displaystyle [br]\begin{equation*}\cos x + \cos 3x + \cos 5x + \cdots + \cos (2n-1)x = \frac{\sin 2nx}{2\sin x}



where
Unparseable latex formula:

\sin x \neq 0\end{equation*}

and n∈Nn \in \mathbb{N}

Solve cos⁡x+cos⁡3x=12,0<x<π\displaystyle \cos x + \cos 3x = \frac{1}{2}, 0 < x < \pi

Anybody want to have a go? :colone:


Thanks bro
Original post by Marxist
You might like this too.


buoys don't float well if they are solid :s-smilie:
Original post by the bear
buoys don't float well if they are solid :s-smilie:


LOL
Original post by the bear
buoys don't float well if they are solid :s-smilie:


Have you ever tried submerging a large lump of polystyrene?! :giggle:
Original post by Gregorius
Have you ever tried submerging a large lump of polystyrene?! :giggle:


that's my buoy

:toofunny:
Reply 76
Avatar for Zacken
Zacken
OP
22
Original post by the bear
that's my buoy

:toofunny:


:shot:

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