Melody

921 Questions
34315 Answers

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Mathigon website

I just discovered a site called mathigon

https://mathigon.org/dashboard
और पढ़ें ..

Melody 2 Apr 2022

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Reporting problems.

There are a number of people having problems at the moment.
If you lodge an error can you please give all relevant information that you can think of.
Where you are in the world - the city or the country - is often very important information. और पढ़ें ..

Melody 16 Mar 2022

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How to make an empty rectangle in Latex

I just worked out how to make an empty box of various horizonal size easily in LaTex.
This is not a recommended method, but other methods that I have tried here have not worked.
This coding is really simple. Just put letters inside और पढ़ें ..

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Melody 15 Mar 2022

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859

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HAPPY ANNIVERSARY CHRIS! (CPhill)

I just realized that you became a member here exactly 8 years ago today!

It has been great to have you here all that time

और पढ़ें ..

विषय से परेे

Melody 13 Mar 2022

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WELCOME BACK CPHILL !

Melody 11 Feb 2022

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Very interesting question. No high level maths required.

This question was posted a couple of days ago.
https://web2.0calc.com/questions/geometry_73561

I think it is really interesting. It looks much more difficult than it really needs to be. और पढ़ें ..

Melody 1 Feb 2022

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Members have a better experience. Their questions get more attention.

Almost everyone is posting as a guest.
If you post as a member your questions will have a far greater chance of a timely and helpful response.
If you are a genuine learner and interact with us, you will become known and answerers will do और पढ़ें ..

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Melody 9 Jan 2022

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HAPPY BIRTHDAY CHRIS!

और पढ़ें ..

Melody 20 Des 2021

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Some guidelines for question askers.

Please note:
1) Ask only one question per post.
2) When asking a question talk about what you have tried for yourself. Then people will take you more seriously and will be more able and willing to help.
3) If you get an answer और पढ़ें ..

विषय से परेे

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Melody 4 Nov 2021

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Remeniscing - a little historical humour.

I just found this old post that some of you, who have been around for a while, might find amusing.

https://web2.0calc.com/questions/look-at-the-new-leader-board

विषय से परेे

Melody 29 Okt 2021

+118692

0

Emerald:
I am having trouble knowing how to use SOH CAH TOA. I know what it is I just don't know how to apply it.

Hi Emerald,
Firstly this is Trigonometry (not calculus)
There are a lot of good you tubes and web sites out there to help you learn and if you are self learning then I'll be happy to help you find a suitable one/s.

If you have a teacher and a text book then the best thing to do is just let them direct you.
If you have specific problems, we in the forum, will be very happy to talk you through them.
It is always difficult when new concepts are presented. You just have to work through it until the light comes on.
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Hi Stu,
How did you embed the web page like that?
I haven't seen the maths portal pages before. They look really good. Thanks Stu.
Thanks Melody.

Melody11 Feb 2014

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That is a very good answer Stu.

Melody11 Feb 2014

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Melody10 Feb 2014

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+20

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Hi everyone,

Great answers today from Rom, lol no username, hampy canper and Kitty<3.

Herpaderp, guest and free answers XD: I really liked that you got involved today and gave full answers. However, I would like you to look at what I wrote after your posts. This way you can learn too.

Stu and gibsonj338, thanks for answering the snark 2+2 question. I am interested to see if this tactic has a positive impact. It may do, I don't know. The usual policy is to ignore such questions.

Stu wrote an information post on how to search the forum. He called it "How to Search: find what you want!"
Thanks Stu I hope that this information is well used

Edition:
I have added 2 information pages.
One is entitled "Information pages worth keeping or developing"
the other one is just "Puzzles"
These contain the web2 addresses of all the relevant posts. I am not sure yet but I thought that instead of bumping lots of posts up I could just bump these 2 up.
Does that sound like a possibility?

That is it, I think.
Thanks everyone.
Melody.

Melody10 Feb 2014

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Melody10 Feb 2014

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I really do want to get to this.
Just not enough hours in a day.

Melody10 Feb 2014

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ann:
Consider the function
f(x) = 4x + 1.
(a) Estimate the area between the graph of f and the x-axis between x = 0 and x = 3 using six rectangles and right endpoints. (Round your answer to two decimal places.)

These are the areas that you are expected to find.

140210 estimating area.JPG

Melody10 Feb 2014

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Rom:
all rational numbers that don't have a finite decimal representation are repeating.

VERY GOOD POINT ROM. I actually didn't think of that, thanks.

BUT, how did you know that it didn't have a finite decimal representation.? (How did you know that the numbers didn't come to an end)
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For people who don't speak 'math'

Rom said that if you can write a number as a fraction then it has to be a rational number.
AND
All rational numbers can be written either as a terminating (ending) decimal or as a recurring (repeating) decimal.

Melody10 Feb 2014

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MAG2124427:
how do I solve the equation, (5x-8)(4x+3)=0

Hi MAG2124427,

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Think about this different equation
a * b = 0
What are the possible answers ?
You are multiplying 2 things and the answer is 0.
This will only happen if a or b or both are equal to 0.
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The same is true for you equation.
If (5x-8) * (4x+3) = 0 then either

5x-8 = 0 OR 4x+3=0
5x = 8 4x = -3

x = 8/5 = 1 and 3/5 or x = -3/4

Melody10 Feb 2014

+118692

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larakas0745:
what is inverse sine=1.1746?

The sine of an angle must ALWAYS be between -1 and +1

∴ Hampy canper is absolutely correct.

Melody10 Feb 2014