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 #392
avatar+100774 
+8

@@ End of Day Wrap     Mon 5 /1/15     Sydney, Australia       Time 10:30pm   ♪ ♫

 

Hi everyone,

I have not posted a wrap for a few days.  I have been preoccupied I am sorry.  

 

There have been many great questions and most of these were answered very well by Tetration, CPhill, ororen1909, NotTheBestMathMaster, rajaae, Kitty<3, Alan, and geno3141.  Thanks all  

 

Now there were many good post.  Here are some of them.  

Every maths mover must be able to find something interesting in there.  

 

1) Interesting domain question.

 http://web2.0calc.com/questions/what-is-the-domain-of-this-function-sqrt-x-3-x-2#rr1

2) Interesting trig.  Unit circle and exact values.   Melody

http://web2.0calc.com/questions/evaluate-each-expression-without-using-a-calculator-and-write-your-answers-in-radians

3) What are permutations and combinations ?      Melody

http://web2.0calc.com/questions/how-many-possible-combinations-are-there-for-a-deck-of-cards

4) A really good rates and volume question.        Melody

 http://web2.0calc.com/questions/help-with-problem_1#rr5

5) Physics    Thanks Alan

 http://web2.0calc.com/questions/two-5-kg-masses-are-attached-to-opposite-ends-of-a-long-massless-cord-which-passes-tautly-over-a-massless-frictionless-pulley-the-upper-mas

6) Some geometry.  Chris would like someone to check his answer but he thinks it is good.  Thanks Chris.

http://web2.0calc.com/questions/the-area-of-a-rhombus-is-250-and-one-of-the-angles-is-37-deg-27-what-is-the-length-of-each-side

7) All in fun :))    NotTheBestMathMaster, Melody, Nauseated, Alan and CPhil.

 http://web2.0calc.com/questions/how-many-times-would-a-mole-of-shoe-strings-16cm-long-stretch-from-earth-to-the-moon

8) Formula for triangular numbers  Thanks Alan and Chris  

 http://web2.0calc.com/questions/how-do-you-work-out-the-formula-nth-term-for-the-triangular-number-sequence

9) Parabola question, different from the norm - Thanks Alan

 http://web2.0calc.com/questions/the-vertex-of-the-parabola-is-on-the-line-y-20-the-y-intercept-is-15-and-3-is-a-zero-of

10) This is not a high level question but I liked it. (percantages)  :)

http://web2.0calc.com/questions/a-chemist-needs-a-solution-of-tannic-acid-70-pure-how-much-distilled-water-must-he-add-to-5-gallons-of-acid-which-was-90-pure-to-obtain-t

11) A couple of revision/learning sites suggested by Chris

http://web2.0calc.com/questions/so-i-am-currently-taking-solid-mensuration-in-college-i-am-having-a-hard-time-to-pick-up-and-learn-the-lessons-were-currently-at-quadrilat

12) Proof by Induction  Thanks Chris

http://web2.0calc.com/questions/math-induction

 

That is it for today.  Thanks everyone  

 

                ♫♪  ♪ ♫                                ♬ ♬ MELODY ♬ ♬                                 ♫♪  ♪ ♫

Jan 5, 2015
 #1
avatar+100774 
+5
Jan 5, 2015
 #1
avatar+100424 
+5

Answering some of those questions you posted yesterday sent me scurrying back to refresh my memory too, JayyH  !!!!

But that's OK........it's always good to review things.....

Here's a couple that I used.....

http://www.mathwarehouse.com/geometry/

If it's any consolation...I always found this topic a little difficult, as well!!!

 

Jan 5, 2015
 #3
avatar+100424 
0
Jan 5, 2015

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