Figure 4-4 - Fan - Chalkdust

The side-lengths of the triangle with angle $\theta + \varphi$.

Sean is a PhD student researching geophysical fluid dynamics at UCL. He studies coastal outflows, but so far has been unable to persuade the department to send him on a research trip to the beach.

In conversation with Clifford Cocks
We chat to the crypto chief about inventing RSA... but not being able to tell anyone
Unknown pleasures: pulsars and the first data revolution
The scientific story behind the cover of Joy Division's treasured debut
In conversation with Matt Parker
Interviewing Matt was a mistake
Balancing the equation
Reviewing the Royal Institution's first Black History Month event.
Black Mathematician Month 2018
We look back at last year's Black Mathematician Month, and give a preview of what to expect this October.
Fun phenomena in fluids
A selection of weird goings-on from the world of fluid mechanics