math.cosh(x) Return the hyperbolic cosine of x.

random.randint(a, b) Return a random integer N such that a <= N <= b. Alias for randrange(a

math.asin(x) Return the arc sine of x, in radians.

statistics.pvariance(data, mu=None) Return the population variance of data, a non-empty iterable of real-valued numbers

real Abstract. Retrieves the real component of this number.

math.nan A floating-point “not a number” (NaN) value. Equivalent to the output of float('nan').

class decimal.ExtendedContext This is a standard context defined by the General Decimal Arithmetic Specification. Precision

class decimal.DefaultContext This context is used by the Context constructor as a prototype for new contexts. Changing

math.tanh(x) Return the hyperbolic tangent of x.

cmath.exp(x) Return the exponential value e**x.