* Doc units of trig functions
* "Very simple" yet I made a mistake
* sins returns in [-0x7FFF,0x7FFF] as the [-1,1] range
* Also `sys_math_atan.c`
* Remove `@param`s without descriptions
* Add note on Math_Atan2S/F arguments being unlike atan2
* "from (1,0) to (x,y)" -> "from vector ..."
* arg names -> `angle`
* Improve `@return` comment on atans