scale=6

pi=4*a(1)

define sin(x) { return s(x) }
define cos(x) { return c(x) }

define sin_grad(x) { return s(x * pi/180) }
define cos_grad(x) { return c(x * pi/180) }

define ln(x) { return l(x) }
define log2(x) { return l(x)/l(2) }