This returns the square root of x, which must be positive or zero. For example, Sqr(Sqrt(12.34)) -> 12.34.
This returns the square of x.
This returns the sine of x, assumed in degrees.
This returns the round value of x to the nearest integer. For example, Round(1.8) -> 2, and Round(1.499) -> 1.
This returns the logarithm of x to the base 10. Hence, Logten(10^12.34) -> 12.34.
This returns the natural logarithm of x. Hence, Ln(Exp(12.34)) -> 12.34.
This returns the factorial of x, which must be positive or zero.
This returns the exponential of x; i.e. e to the power of x.
This returns the cosine of x in degrees.
This returns the arctangent of x in degrees. For example, remembering the venerable trigonometric identity, Tan(x) = Sin(x)/Cos(x), we get Arctan(Sin(12.34)/Cos(12.34)) -> 12.34.