From PDEs to Trig

Hmmm. You know, maths is a lot harder than it used to be. Or maybe I’m just not as bright. Probably the later

cos(\gamma)sin(\theta_g)cos(\phi_g)+sin(\gamma)cos(\theta_g)-sin(\theta_l)cos(\phi_l)=0

where \gamma, \theta_l and \phi_g are given, \theta_g is free, sin(\phi_l) = \frac{sin(\theta_g)sin(\phi_g)}{sin(\theta_l)}, and i want to find \phi_l .

Time to refresh my memory of trig identities.

(Disclaimer: this post mainly exists as wordpress was the most convenient latex editor and I wanted to make a note of my equation so I don’t forget, and if you know me, you’ll know that my hand writing is pretty bad at times. So is my grammer).

In other, more exciting news, I have a gig this week.

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