Monthly Archives: April 2007

Trigonometric problem

Here’s my solution to a nice little trigonometric problem posted by miss loi. Show that [tex]\frac{ \tan x + \sec x – 1} { \tan x – \sec x +1 } \equiv \tan x + \sec x[/tex] [tex]\frac{ \tan x … Continue reading

Posted in Problems | 3 Comments

Entrance exam

This article in BBC news about a competition from the Royal Society of Chemistry, made its rounds last week. I had wanted to submit my solution for the 500 pound prize, but decided not to when I realized how quickly … Continue reading

Posted in Fun Stuff, Teaching | 1 Comment

Strange Curves, Counting Rabbits, & Other Mathematical Explorations

By Keith Ball. Yet another popular maths book, with the usual suspects of Fibonacci numbers and fractal curves. But this book is different in the topics chosen. Influenced by his own tastes, he discusses Stirling’s formula and Pade approximation among … Continue reading

Posted in Books | 1 Comment

Euler, born 15th April 1707

My favourite sum: [tex]\displaystyle \sum_{n=1}^{\infty} \frac{1}{n^2} =\frac{\pi^2}{6}[/tex] To Euler, The master of infinity, who summed with impunity! PS: A nice article on infinity, explaining concepts up to Cantor’s work. via via amazon.

Posted in Number Theory, Quotes/People | Leave a comment

New math here we come

I was randomly surfing when the title Weapons of Math Destruction caught my eye. This is a site/blog about “new” math taught to American school children. There are some comics and also this interesting link to a video. In the … Continue reading

Posted in Teaching | 4 Comments

Coincidences or just bad luck

How many times have you tried to search for a particular item and find that the only thing missing is the one that you want? Two years back, I was searching for a 1995 article in the Rocky Mountain Journal … Continue reading

Posted in Fun Stuff, Number Theory, Probability | 1 Comment