In Hong Kong, junior secondary 2, generally at 13 years old. It is actually pretty simple. Look at this diagram: Spoiler: Spoil me, but don't spoil the fun This basically explains what sin cos and tan are. Now, let's go more advanced. Look at this circle: Spoiler: believe me, spoilers don't spoil the fun of trigonometry. It appears the text is partially hidden. So: In my code, I additionally added a Y increase along the loop, so as θ increases (sin 0 = sin 360°), the height of the particle also increases. So it becomes like this: (example) Particle A - 1 block from center at angle 0° Particle B - 1 block from center at angle 45°, then brought 0.5 meter higher Particle C - 1 block from center at angle 90°, then brought 1 meter higher Particle D - 1 block from center at angle 135°, then brought 1.5 meters higher Mind leaving a like if you find this interesting or helpful

But I relly don't understand that. But after @PEMapModder's post, I kinda start seeing how it works. I will google it

Indeed, but I remember that I never understood web definitions of those trigonometric functions until a human taught me in a simple way.

I learned only goniometry (sin, cos, tam) so i know what these functions do but i think i can't use them in 3D

In Russia sin, cos on the geometry are in the ninth grade. I don't understand these formulas So i don't understand use these functions.

from plugin Firework PHP: $mx = mt_rand(-$size, $size) / 5; $my = mt_rand(-$size+1, $size+1) / 5; $mz = mt_rand(-$size, $size) / 5; $motion = new Vector3($mx, $my, $mz);