June, 2013

Secrets of the Mathematical Ninja: Taylor series and the product rule

$f(x)$, it turned out, was $x^2 \tan(x)$. "That's going to be a pain to differentiate," said the student, sighing. Taylor series were not his favourite; differentiating trig functions just made matters worse. "I have a trick," said the Mathematical Ninja. "Will it save me a lot of work?" "It will."

Read More

Silly Questions Amnesty

Want a silly answer? You know what to do.

Read More

The butterfly isn’t to blame

When I was about 12, and my brother about 10, one of us1 threw a lump of coal at the other. The coal ricocheted around our living room and smashed an ornament. In the subsequent inquest, both of us tried to blame the other, as brothers do; he reasoned, perversely,

Read More

The Mathematical Ninja’s Guide To Famous Triangles

"$\arccos\left(\frac{1}{3}\right)$", said the student, absent-mindedly. The Mathematical Ninja, without thinking, said "$1.23$." "It says $70.5$ here… but, but," said the student, realising that the Mathematical Ninja was not going to accept answer like that, "my calculator has… somehow… got switched into degree mode, haha, let me fix it. Ah, yes,

Read More

Sign up for the Sum Comfort newsletter and get a free e-book of mathematical quotations.

No spam ever, obviously.

Where do you teach?

I teach in my home in Abbotsbury Road, Weymouth.

It's a 15-minute walk from Weymouth station, and it's on bus routes 3, 8 and X53. On-road parking is available nearby.

On twitter