QED Insight (Santo D’Agostino)

Recent Posts
 How does the value of an inverse cosine function change when the unit of its argument changes?
 Why do Airplanes Fly?
 New Online Tutoring Site: QED Infinity
 “Religious Right’s Rejection of Science is Baffling,” by David Suzuki
 The Day Niagara Falls Ran Dry
 “A Lesson in Teaching to the Test, From E.B. White,” by Anne Stone and Jeff Nichols
 “Student Learning Can Only Be Described, Not Measured,” by Rog Lucido
 A Neat Trick For Determining The Integrals Of exp(x) cos x And exp(x) sin x
 “No Student Left Untested,” by Diane Ravitch
 Confusing Use Of Numbers: BestBefore Dates
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Monthly Archives: February 2011
Strange Fruit
The poem was written by Abel Meeropol, and the performance here is by Billie Holiday. A film telling the story of the song is here. Strange Fruit Southern trees bear strange fruit, Blood on the leaves and blood at the … Continue reading
Posted in Music, Poetry, Society
Tagged Abel Meeropol, Billie Holiday, Black History Month, Neil Young, Southern Man, Strange Fruit
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“Caution: Blind Driver”
I was driving on Highway 406 earlier today, and I noticed a passenger van ahead of me in the adjacent lane having a bumper sticker with the words in the title of this post. Provacative, wouldn’t you say? As I … Continue reading
An Operator Method for Solving Second Order Differential Equations, Part 2
In a previous post we discussed an operator method for solving certain second order ordinary differential equations. In this post I’ll explore this operator method a little further. I first learned about this method from an old book, Higher Mathematics … Continue reading
Proportional Reasoning
One of the most important skills in “numerical literacy” is proportional reasoning. I was reminded of this earlier today when I went out to buy a couple of pies for this evening’s family gathering. The pies came in many flavours, … Continue reading
Posted in Education, Mathematics, Physics
Tagged numerical literacy, proportional reasoning
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The War On Women
Women are under attack everywhere. Central Africa is the worst place for a woman to be right now, but violence against women occurs everywhere. To advocate for women in this environment takes strength, but doing so by putting your own … Continue reading
Posted in Society
Tagged CARSA, Life's Lessons, Niagara Regional Sexual Assault Centre, Stephanie Nolen
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Two Nice Probability Problems
Over at Freakonometrics, here is a pair of nice probability problems. The first problem also appears here as Problem #5. A number of solutions for your consideration are here. A very elegant solution by Ted Hwa is here.
Posted in Math puzzles, Mathematics
Tagged airplane seating puzzle, probability, probability puzzle
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An Operator Method for Solving Second Order Differential Equations
In talking about power series in a previous post, I mentioned one of their uses: as an aid in solving differential equations. This reminds me of a neat trick for solving some differential equations, which I will discuss in this … Continue reading