-- Extra transcendental builtins: tan, log10, log2, atan2 (radians).
-- Phase angle of a 2D vector (atan2 takes y then x, C/Python convention).
phase y:n x:n>n;atan2 y x
-- Decibels: 20 * log10(amplitude_ratio).
db ratio:n>n;l=log10 ratio;*20 l
-- Bit depth needed to represent n distinct values: ceil(log2 n).
bits n:n>n;l=log2 n;cel l
-- Slope of a line at angle theta (radians).
slope theta:n>n;tan theta
-- run: phase 1 1
-- out: 0.7853981633974483
-- run: db 100
-- out: 40
-- run: bits 256
-- out: 8
-- run: slope 0
-- out: 0