# Explore Animated Gifs, Minimal and more!

20 гифок, которые объяснят математику на пальцах

### The relationship between Sin, Cos, and the Right Triangle.

Sinus Kosinus kruhová obluda

### How angles are measured in radians, visually explained.

(GIF) How angles are measured in radians, visually explained.

"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."

This animation suggests one way to draw a perfect ellipse by hand. Place two drawing pins in a board, and tie a piece of string around them (the red dotted lines in the picture). If you pull the string tight with a pen, then the curve you will get is an ellipse. This means that the total length of the two red lines is constant. The two pins are at the foci of the ellipse, special points. Planetary orbits are ellipses, with the Sun at a focus. What would happen if you moved the pins closer…