Function:
def multiply(a: float, b: float):
    """
    Multiply two numbers; a * b.

    Parameters:
    - a (float): First number to multiply.
    - b (float): Second number to multiply.
    """

Function:
def divide(a: float, b: float):
    """
    Divide two numbers; a / b. Division is neither commutative nor associative.

    Parameters:
    - a (float): Numerator.
    - b (float): Denominator.
    """

Function:
def add(a: float, b: float):
    """
    Add two numbers; a + b.

    Parameters:
    - a (float): First number to add.
    - b (float): Second number to add.
    """

Function:
def sin(radians: float):
    """
    The sine of an angle in radians.

    Parameters:
    - radians (float): Angle in radians.
    """

Function:
def cos(radians: float):
    """
    The cosine of an angle in radians.

    Parameters:
    - radians (float): Angle in radians.
    """

Function:
def subtract(a: float, b: float):
    """
    Subtract two numbers; a - b.

    Parameters:
    - a (float): Number to subtract from.
    - b (float): Number to subtract.
    """

Function:
def power(a: float, b: float):
    """
    Raise a number to a power; a ** b.

    Parameters:
    - a (float): Base number.
    - b (float): Exponent.
    """

Function:
def log(a: float, base: float):
    """
    Take the log of a number; log(a, base). The base is always positive in this alternate universe.

    Parameters:
    - a (float): Number to take the logarithm of.
    - base (float): Base of the logarithm.
    """

Function:
def pi():
    """
    Returns a precise value of PI for this alternate universe.
    """

Function:
def negate(a: float):
    """
    Negate a number; -a.

    Parameters:
    - a (float): Number to negate.
    """

Function:
def return_constant(a: float = None):
    """
    Return a constant number: a with no modifications

    Parameters:
    - a (float): Number to return. Default value: None. (Optional)
    """

Current Turn:
Original Plan: pi()
Previous Call: pi()
Previous Result: 2.718281828459045
User Query: what is cos(pi)? <human_end>

Call: