$$\textit{Introduction:}$$

Hello! You have reached the “Reference Material” page. This page is a list posts that have explained things well and are good to look back at for future posts and for reference material.

I redid this to try to make it easier to access/refer back to. Here is the original post by Melody: http://web2.0calc.com/questions/information-pages-worth-keeping-or-developing

This page is broken down into different sections as to try to make it easier to refer back to. For the most part, the topics are organized by “grade levels” of mathematics (like Algebra, Trigonometry, Calculus, etc.)

If you would like to add something to this thread, you can either send me a message with what you want added and I'll edit this post, or you can reply to the post with what you want added. If you reply to this post, please only post one reply and then just edit it as you want to add more information. This will help to keep the thread somewhat organized and not too messy.

Remember, good manners are always important and very much appreciated!

http://web2.0calc.com/questions/good-manners-are-always-important_2

Without further a due, let’s dive right in!

$$\textit{\mathbf{Various calculators and math resources:}}$$

**Using the web2 calc:**

• How to use the web2 calc for different things in physics like electron mass/atomic mass:

http://web2.0calc.com/questions/new-calculator-option

• Converting measurements on the web2 calc, two different methods:

http://web2.0calc.com/questions/how-to-convert-486mm-to-m#r2

http://web2.0calc.com/questions/1505-91-convert-unit-of-measurement#r2

• Absolute values on the web2 calc:

http://web2.0calc.com/questions/how-do-you-do-an-absolute-value

**Calculator for linear regression (suggested by Alan)**

http://www.alcula.com/calculators/statistics/linear-regression

**Make a graph! (recommended by Melody and CPhill)**

https://www.desmos.com/calculator

**Great math materials/explanations:**

**Conversion web page:**

http://www.convert-me.com/en/convert/volume/

**GeoGebra, math software and tons of math materials!**

http://www.geogebra.org/cms/en/

$$\textit{Basic math concepts:}$$

**The good ol' times tables:**

**Postive and negative numbers:**

http://web2.0calc.com/questions/positive-and-negative-numbers-directed-numbers

**Addition and subtraction of direct numbers:**

http://web2.0calc.com/questions/it-just-doesn-t-make-sense-to-me

**Dividing whole numbers by fractions:**

http://web2.0calc.com/questions/dividing-whole-numbers-by-fractions

**How to type in a fractions on this calculator:**

http://web2.0calc.com/questions/how-do-i-type-in-fractions#r2

**What happens when you divide by zero?**

http://web2.0calc.com/questions/what-happens-when-you-divide-by-zero

**Estimating square roots with the Newton method:**

http://web2.0calc.com/questions/hi-i-want-to-know-how-to-solve-somthing-like-nbsp#r1

**Square root in answer verses introduced square root.**

http://web2.0calc.com/questions/answer-of-square-root-4-must-be-plus-minus-2

**OEIS (On-line encyclopedia of Integer sequences) Can’t find a pattern between a few numbers? Try out this website!**

** **

$$\textit{Algebra:}$$

**Quadratic equation links:**

http://web2.0calc.com/questions/grouping-method-and-factorizing-quadratic-equations

http://web2.0calc.com/questions/factorising-any-quadratic-formula-some-thoughts

http://web2.0calc.com/questions/quadratic-formula-do-you-have-trouble-remembering-it

**Solving a more difficult algebra problem:**

http://web2.0calc.com/questions/solve-for-x-x-6-5-x

**A page explaining how to solve inequalities:**

http://www.mathsisfun.com/algebra/inequality-solving.html

**Youtube clip explaining how to factor trinomials using the grouping method:**

https://www.youtube.com/watch?v=HvBiJ9W00Z4

**Graphing log functions on the web2 calculator:**

http://web2.0calc.com/questions/how-do-you-insert-log-into-the-graph-on-this-website

**Negative indices and negative exponets (a great explanation by Melody)**

http://web2.0calc.com/questions/indices-especially-negative-indices

**Advanced Algebra - Example of Remainder Theorem with full explanation.**

http://web2.0calc.com/questions/help-me-please_7

**Domain and Range - Exponential Functions **

http://web2.0calc.com/questions/would-i-be-able-to-get-the-domainand-range-from-a-function-or-does-it-have-to-be-from-a-graph

$$\textit{Geometry:}$$

**Understanding conics, focus, directric, etc, with interactive graphing:**

http://www.intmath.com/plane-analytic-geometry/4-parabola.php

**Angle with degrees, minutes, and seconds:**

**Segment of a circle:**

http://web2.0calc.com/questions/how-do-i-find-the-length-of-a-segment-of-a-circle#r2

**Surface area of a cylinder:**

http://web2.0calc.com/questions/what-is-the-surface-are-of-a-cylinder-with-r-8-h-4#r1

**A YouTube clip that shows measuring volume using displacement:**

https://www.youtube.com/watch?v=n3ia4i-uFTM

**Some discussions/explainations of pi:**

http://web2.0calc.com/questions/what-is-the-value-of-pi#r1

http://web2.0calc.com/questions/why-does-pi-and-3-14-have-different-answers#r3

** **

$$\textit{Probability and statistics:}$$

$$\textit{Trigonometry:}$$

**Inverse trig on the web2 calculator:**

http://web2.0calc.com/questions/how-can-i-put-tan-minus-in-the-calculator

**How do you choose the correct trigonometric ratio (sin, cos or tan) to use?**

**Graphing complicated trig functions:**

http://web2.0calc.com/questions/graphing-trig-functions_1#rr2

$$\textit{Calculus:}$$

**Introductory calculus:**

**Problem chain rule question. **

http://web2.0calc.com/questions/a-street-light-is-on-top-of-a-6m-pole

** **

$$\textit{Misc:}$$

**What time is it around the globe?**

http://web2.0calc.com/questions/world-time-map

**Copy and paste web addresses.**

http://web2.0calc.com/questions/how-to-copy-and-paste-web-addresses

**Information for new people:**

http://web2.0calc.com/questions/information-for-new-people

$$\textit{Website tips/tricks:}$$

**One of reinout_g's tricks:**

http://web2.0calc.com/questions/found-something-that-makes-life-a-lot-easier

**How do I upload an image?**

http://web2.0calc.com/questions/how-to-upload-an-image-nbsp_1

**Searching with keywords:**

http://web2.0calc.com/questions/how-to-search-use-keywords-to-find-what-you-want

**LaTex (a format that can be used when answering questions on this forum) This can be confusing when you first look at it. Here’s some posts on how to use LaTex:**

http://web2.0calc.com/questions/test_6

http://web2.0calc.com/questions/latex

$$\textit{The "fun" section!}$$

*Here's some funner links/topics to finish up the post.*

**Adam Spencer, math comedian:**

www.ted.com/talks/adam_spencer_why_i_fell_in_love_with_monster_prime_numbers.html

**A math-game website:**

**Fun with Fractals! YouTube video!**

http://www.youtube.com/watch?v=XwWyTts06tU

**Why math is so hard:**

NinjaDevo Jun 22, 2014

#3**0 **

good, ninja. i like reading them.

it is like my newspaper.

i need more of these!

They are so intersting!

Thanks, NinjaDevo!

DragonSlayer554 Aug 17, 2014

#4**0 **

I think that this is a link ot download the web2.0 calc

What happens when you divide by 0 - Kitty<3

http://web2.0calc.com/questions/what-happens-if-you-divide-by-0#r3

Long division

http://www.mathsonline.org/pages/divisionSolution.html?1234&12&0&1

Melody Oct 13, 2014