Melody

921 Questions
34315 Answers

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Mathigon website

I just discovered a site called mathigon

https://mathigon.org/dashboard
lee mas ..

Melody 2 abr 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. lee mas ..

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 lee mas ..

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Melody 15 mar 2022

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866

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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

Fuera tema

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. lee mas ..

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 lee mas ..

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Melody 9 ene 2022

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HAPPY BIRTHDAY CHRIS!

Melody 20 dic 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 lee mas ..

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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

Fuera tema

Melody 29 oct 2021

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amber alexander:
how to put in residuals in a calculator

You will need to give an example of what you mean.

Melody20 dic 2013

+118716

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jp13aav:
what is INV

this is the working out and answer to a question

θ = INV Sin0.75 = 48.6o
What does the INV mean?

inv stands for inverse.
for example
sine 30 ^o=0.5
so
Inverse sine 0.5 = 30 ^o

Inverse sine 0.5 can also be referred to as arcsine 0.5 and it can be written a number of different ways.
the most common ways are
sin ^-10.5 This is easily confused with (sin 0.5) ^-1 (but it is completley different in meaning) And for this reason I think this notation is silly but it is the most common notation.
and
asin0.5 I like this notation much better but it is less common.

The inv in your question is not proper maths notation it is just trying to give you guidance for how it is done on a calculator.

If you look at the sin button on your calculator, above it probably in a different colour is sin ^-1
To use this key, you have to press another key usually in the top left corner of your calculator first.
It will be marked as INV or possibly 2nd Function
That is the button that your INV is referring to.

Remember, before you do any of this make sure that your calculator is set to degrees. There should be a tiny little D at the top of your display panel. It will be there all the time unless you change it to something else.

To sum up
You have to press the INV key if you are looking for an angle.

Melody20 dic 2013

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thatperson:
infinity divided by zero

That is undefined.

Melody20 dic 2013

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I hope that all your study pays off well.

You don't need to do anything now. Maybe you will do it when all your exams are finished. I certainly don't want to put more pressure on you.

Try joining up properly and then you can send me a private message. If I receive one I will respond quickly.
In the past this has not worked for me. I have received some messages but I don't think that the messages I send ever leave my outbox.
Anyway I would like to see if I can reach you that way.

Thanks
Melody.

Melody20 dic 2013

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Stuck34:
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So is the answer to the entire question 3??

Well,
What you need do is put
24 divided by (3 x 2) =
into a calcuator and see if you get the desired answer which is 4.
You can click into 'scientific calculator' at the top of this page and use that one if you want. Don't forget the brackets.
If the calculator says that the answer is 4 then your answer is correct. If it gives a different answer then your answer is wrong.
so you tell me, is your answer, 3, correct?

Melody20 dic 2013

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Yes, I am not a language person at all. I only speak English and when i was at school English was my worst subject. I am always astonished that students (like the ones at the international college and like yourself) can study difficult subjects in a foreign language. I don't think I ever could have done that!
I have never really studied grammar but I do think i would find it easier than other facets of language because there are at least rules that can be followed.
I think it would be easier to learn another language if you first formally understood the grammar of your own language. I think that would give you a starting point for comparisons.
As I said, I don't speak another language so this could all be nonsense.
I have had fun chatting and working with you on this question. If you want to chat more, that would be nice.
Thanks.
Melody

Melody20 dic 2013

+118716

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I know exactly where Slovenia is. Are you from Ljubljana?. I love to play geography games so I know where lots of places are.
I just read your post again. Are you actually from Slovenia or are you just learning Slovenian?

Melody20 dic 2013

+118716

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jony13:
if 1 = 355.47, how much is 0.02? and what is the matematical way to get that response? thanks

Well, If 1 truck load is 355.47Kg then 0.02 of a truck load must be 0.02*355.47 = 7.1094Kg

So the answer simply must be 7.1094

Melody19 dic 2013

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mmm Interesting idea.

Melody19 dic 2013

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What is your first language and where are you from Narciss?
You don't have to answer of course but I am always interested in where people live.
I am in Sydney, Australia. I used to teach at an international college and I really loved it.

Melody19 dic 2013