As all (well, at least those that can remember) 15+ year old’s know, to find the length of a side of a non-right angled triangle you can’t use Pythagoras theorem and instead require the so called ‘Cosine Rule’.

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Associate Professor in Space Environment at the University of Birmingham, creating the next generation space weather forecast models. Included on Forbes 30 Under 30 list.

# Tag: cosine rule

## Cosine Rule on a Sphere

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As all (well, at least those that can remember) 15+ year old’s know, to find the length of a side of a non-right angled triangle you can’t use Pythagoras theorem and instead require the so called ‘Cosine Rule’.