My Funny Pictures #NewPost 
the diversity of colours is amazing oh my
One of the answers to the topic: Visually stunning math concepts which are easy to explain at Mathematics Stack Exchange.
I think if you look at this animation and think about it long enough, you’ll understand:
- Why circles and right-angle triangles and angles are all related
- Why sine is opposite over hypotenuse and so on
- Why cosine is simply sine but offset by pi/2 radians