π
πY: πY. Pervasive.
πY
π1 ⍝ 3.141592653589793 π2 ⍝ 6.283185307179586
XπY: Xπ/Y. Angles in radians.
XπY
1π2 ⍝ 1.5707963267948966 2π3 ⍝ 2.0943951023931953
Use ○ to turn an angle into a unit-circle point.
○