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  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#876 Re: This is Cool » Microsoft Math 3.0?? » 2007-07-28 15:49:33

hope it's not as bad as microsoft's speech recognition *shudders*

#878 Re: Dark Discussions at Cafe Infinity » Maths or Physics? » 2007-07-27 21:40:07

Your school system might be different from mine. You can't do specialist in year 11 (at least that's what I've heard). General Maths leads into Specialist Maths. The A just refers to top class. I don't know the difference between olympiad physics and physics, but I think it's just physics with more of an emphasis on problem solving.

#879 Re: Dark Discussions at Cafe Infinity » Maths or Physics? » 2007-07-27 21:25:49

Well, this is just my opinion, but I would go for Specialist Maths. I'm also doing VCE starting next year and the guide book says you will be studying Vectors and Mechanics in Specialist Maths, which is also used in Motion Physics. Chemistry ought to cover the atomic physics, and whatever is left hopefully shouldn't be too hard to catch up on yourself.
I picked Methods A 1&2, General A 1&2 and Olympiad Physics for next year.

Some info from my guide book:

Units 1 and 2: General Mathematics
General Mathematics provides courses for diverse groups of students and may be implemented in a number of ways. The areas of study are: Statistics and Probability, Arithmetic, Functions and Graph, Algebra, Geometry, and Trigonometry. General Mathematics (A) Units 1 and 2 topics: Algebra, Arithmetic, Functions, Graphs, Statistics, Probability, Geometry, Proof and Vectors. Students who intend to attempt Specialist Mathematics Units 3 and 4 are advised to choose this subject. General Mathematics (B) Units 1 and 2 topics: Algebra, Arithmetic, Functions, Graphs, Statistics, Probability and Geometry.

Units 3 and 4: Specialist Mathematics
Specialist Mathematics consists of the following areas of study: Coordinate Geometry, Circular (trigonometric) Functions, Algebra, Calculus, Vectors (in two and three-dimensions) and Mechanics.

The development of course content should highlight mathematical structure and proof. All of this material must be covered in a progression from Unit 3 to Unit 4 with an appropriate selection of content for each of Units 3 and 4.

The appropriate use of technology to support and develop the teaching and learning of mathematics is to be incorporated throughout each unit and course. This will include the use of some of the following technologies for various areas of study or topics: graphics calculators, spreadsheets, graphing packages, dynamic geometry systems, statistical analysis systems and computer algebra systems. In particular, students are encouraged to use graphics calculators, spreadsheets or statistical software for probability and statistics-related areas of study and graphics calculators, dynamic geometry systems, graphing packages or computer algebra systems, in the remaining areas of study systems, both in the learning of new material and the application of this material in a variety of contexts.

Physics:
Students develop skills of observation, research, analysis, interpretation and reporting by hands-on experiments, excursions and classroom discussion. Contextual knowledge and understanding are developed appropriately for a wide range of tertiary studies.
Unit 1: Wave-like properties of light, Nuclear and radioactivity Physics, and Energy from the nucleus.
Unit 2: Movement, Electricity, Alternative energy sources
Unit 3: Motion, Electronics and Photonics, Investigating materials and their use in structure
Unit 4: Electric Power Interaction of light and matter, and Sound.

#880 Re: Dark Discussions at Cafe Infinity » Maths or Physics? » 2007-07-27 21:12:07

Is this for high school graduation or for university?

#881 Re: Help Me ! » Rotating a Graph » 2007-07-27 20:04:20

Thanks George, I'll take a look at it. Although, my teacher probably didn't expect us to have a program like that, so I think I should try to find an exact answer too.

edit: I copied and pasted the code into JustBasic. The axes appeared but nothing else happened.

#882 Re: Help Me ! » Rotating a Graph » 2007-07-27 19:45:22

Hmmm, I still don't quite understand... what software did you use for this?

#883 Re: Help Me ! » Rotating a Graph » 2007-07-27 19:25:46

Thanks John, but what did you use to get that?

#884 Re: Help Me ! » Rotating a Graph » 2007-07-27 19:13:07

(a,b) rotated through θ° about (c,d) will arrive at (x,y)

Distance from (a,b) to (c,d):

By analysing rotation in a circle, distance from (a,b) to (x,y):

Hence,


And so


This is absurd because you need to know more than the information you can have at any one time.dunno

#885 Help Me ! » Rotating a Graph » 2007-07-27 17:57:40

Identity
Replies: 12

How do I find the axis intercepts of

rotated 60° clockwise about it's point of inflexion?

#886 Re: Introductions » Greetings fellow Mathematicians » 2007-07-27 17:49:01

Welcome Math_Girl! Seems like your a math wiz! Don't worry about your classmates, later on being good at maths becomes cool smile

#888 Help Me ! » Quadratics and Ticket Sales » 2007-07-25 21:53:43

Identity
Replies: 5

The local theatre has a full house of 1050 nightly and charges $15 per ticket. The manager estimates that the ticket sales would decrease by 50 for each $1 increase in the ticket cost. What ticket price should be charged for maximum income?

#889 Re: Help Me ! » Graphing websites » 2007-07-23 19:10:56

Hi meebo0129!

I myself don't know of any websites that can graph 3D function, but if you go here you can download a free graphics calculator that will let you:

www.graphcalc.com

#890 Re: This is Cool » ones in natural data » 2007-07-19 20:20:12

Is that a theoretical or experimental probability?

#891 Re: Jokes » Spanish class » 2007-07-19 03:44:09

Nice joke! The girls' argument is more funny but neither side has a winning argument big_smile

#892 Help Me ! » m/0 = ∞? » 2007-07-18 08:52:36

Identity
Replies: 2

Is it true that

m≠0?  I've heard many say it's true. However, any number divided by 0 will surely give a result "greater" than inifinity, because even an infinite number of 0s could not make m, and hence 'undefined'.

The question came to me while looking at this unintentionally funny proof of god:
You know the formula, m over nought equals infinity, m
being any positive number? Well, why not reduce the
equation to a simpler form by multiplying both sides by
nought. In which case you have m equals infinity times
nought. That is to say that a positive number is the product
of zero and infinity. Doesn't that demonstrate the
creation of the universe by an infinite power out of nothing?
Doesn't it?
tongue

#893 Re: Dark Discussions at Cafe Infinity » Graviton to photon convertion » 2007-07-17 12:23:24

No, I don't think it's because of the spin of the galaxies, but quantum mechanics. Just look it up anywhere, you could even read 'A Brief History of Time' which talks about it.

#894 Maths Teaching Resources » Downloadable Graphics Calculator » 2007-07-16 23:41:20

Identity
Replies: 2

This website has a really good free downloadable calculator for graphing. It's 3D graphs in particular are of a much better standard than you would get in handhelds.

www.graphcalc.com

#895 Re: Puzzles and Games » The great dictionGuy » 2007-07-16 17:33:24

Wonderful! Perhaps you could start with:

point
line
lie on
between
congruent

#896 Re: Maths Teaching Resources » Very interesting math site » 2007-07-16 00:18:30

It's simply another graphical representation of one of the methods in Vedic Mathematics, which allows fast mental calculations, see Tutorial 5 here:

http://www.vedicmaths.org/Introduction/ … torial.asp

#897 Re: Puzzles and Games » The light switch » 2007-07-12 15:30:08

I don't think there is any possible answer. This question implies a hypertask, that is, an infinite number of tasks to be completed in a finite amount of time. It has been concluded by many that this is not possible.

#898 Re: Help Me ! » trigonometric integration » 2007-07-11 15:47:24

Krizalid wrote:

Yeah, that's pretty much hard.

Anyway

Wow r u serious? Those mathematicians have gone bonkers i tell u eek

#899 Re: Help Me ! » How would I enter this into ym TI-89? » 2007-07-09 21:46:56

My math teacher told me that you can't enter cube roots as they are shown with the root sign in the TI-89.
If you want

, then you have to press ' x ^ (1 ÷ 3)'.

#900 Re: Help Me ! » Basic limit proof » 2007-07-09 05:16:31

That was an inequality used in a previous proof (the one for sine) so I thought I might borrow it tongue

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