Using The Complex Submenu - Casio fx-CP400 User Manual

• " " is calculation precision, which you can specify as an integer in the range of 1 to 9. Using any value
outside this range causes an error.
• This command returns an approximate value when calculation precision is specified for " ".
• This command returns a true value when nothing is specified for " ". If the true value cannot be obtained,
however, this command returns an approximate value along with
• Discontinuous points or sections that fluctuate widely can adversely affect precision or even cause an error.
• Inputting a larger number for " " increases the precision of the calculation, but it also increases the amount
of time required to perform the calculation.
• The value you input for the end point of the interval must be greater than the value you input for the start
point. Otherwise an error occurs.
Example: To find the minimum point of
Example: To find the maximum point of –
u gcd [Action][Calculation][gcd/lcm][gcd]
Function: Returns the greatest common denominator of two expressions.
Syntax: gcd (Exp/List-1, Exp/List-2 [ ) ]
Example: To obtain the greatest common denominator of
u lcm [Action][Calculation][gcd/lcm][lcm]
Function: Returns the least common multiple of two expressions.
Syntax: lcm (Exp/List-1, Exp/List-2 [ ) ]
Example: To obtain the least common multiple of
u denominator [Action][Calculation][fraction][denominator]
Function: Extracts the denominator of a fraction.
Syntax: denominator (Exp/List [ ) ]
Example: To extract the denominator of the fraction ( – 2)/( + 1)
u numerator [Action][Calculation][fraction][numerator]
Function: Extracts the numerator of a fraction.
Syntax: numerator (Exp/List [ ) ]
Example: To extract the numerator of the fraction ( – 2)/( + 1)

Using the Complex Submenu

The [Complex] submenu contains commands that relate to calculations that involve complex numbers.
u arg [Action][Complex][arg]
Function: Returns the argument of a complex number.
Syntax: arg (Exp/Eq/List/Mat [ ) ]
Example: To obtain the argument of complex 2 +
2
– 1 with respect to
2
+ 1 with respect to
+ 1 and
2 – 1 and 2 + 2 – 3
i
(in the Radian mode)
= 4.
2
– 3 – 4
Chapter 2: Main Application 67