# TrigonometryTrigonometry to Memorize and Trigonometry to Derive

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#### Ackbach

##### Indicium Physicus
Staff member
I'm very excited to have updated my TrigKnowledge file. The two triangles are now drawn using tikz, and the two graphs of sine and cosine I drew using Sage. I figured out a way to get Sage to use multiples of $\pi/4$ as the tick markers on the $x$-axis, which greatly enhances this graph, in my opinion. Enjoy!