Function

Description

exp(x)

e^x , exponent

ln(x)

lnx, natural logarithm

lg(x)

lgx, decimal logarithm

log(a,x)

log_ax, logarithm by base a

sqrt(x)

, square root of x

abs(x)

|x|, absolute value of x

sin(x)

sin x, sine of x

cos(x)

cos x, cosine of x

tg(x)

tg x, tangent of x

ctg(x)

ctg x, cotangent of x

asin(x)

arcsin x, arcsine of x

acos(x)

arcos x, arcsine of x

atg(x)

arctg x, arc-tangent of x

actg(x)

arcctg x, arc-cotangent of x

sh(x)

sh x, hyperbolic sine of x

ch(x)

ch x, hyperbolic cosine of x

ent(x)

[x], entire party of real number, e.g.
ent(-3.5)=-4, ent(3.5)=3, ent(3)=3

sign(x)

Sign x, sign of x:
-1  for negative x,  1  for positive x,  sing(0) = 0