
Notes on using the Calculator
 To use the calculator,
 click in the entry box
 enter an expression
 press return or click on the button "Compute"
 the result will appear in the box below
Examples:
 4 * Pi * 6400^2 (computes the earth's surface area in square kilometers)
 4 * Pi * (6.4e6)^2 (computes the earth's surface area in square meters)
 e^{ (1.5) / 2}
 You may use the following binary operators:
+ for addition
 for subtraction
* for multiplication
/ for division
^ for exponentiation
A common mistake is to forget * when multiplication is intended.
 The special mathematical constants, pi = 3.14... and e=
2.78... are known and may be referenced by PI and E (case is
not important).
 Numbers may be entered in scientific notation: the syntax is,
for example,
 1e12 which denotes 10^(12) (it is important to have a "1"
preceeding the exponent).
 5.9e24 which denotes 5.9*10^(24).
 The usual rules of precedence apply when binary operations are
concatenated. For instance, exponentiation is performed first,
followed by multiplication and division and finally addition and
subtraction. If in doubt, use parentheses
to indicate the order in which operations should be performed:
( ), { } and [ ].
 Case is insignificant; that is, TaN(1) is the same as tan(1).
 Blanks are ignored; that is t A n (1 ) is the same as tan(1).
 The following mathematical functions are supported. While it is not
necessary to delimit the argument to such a function,
it is highly recommended. This insures that you produce the value
you expect. For instance, you should write tan(Pi^2) or tan(Pi)^2
rather than tan Pi^2. (For your information, tan Pi^2 produces
tan(Pi)^2.)
 Abs: Absolute value
 Acos or Arccos: Inverse cosine
 Asin or Arcsin: Inverse sine
 Atan or Arctan: Inverse tangent
 Ceil: returns the smallest integer larger than or equal
to the argument
 Cos: Cosine
 Cot: Cotangent
 Csc: Cosecant
 Delta: Delta function
 Floor: returns the greater integer smaller than or equal
to the argument
 Ln: Natural logarithm
 Sec: Secant
 Sgn: returns 1 if the argument is negative, 0 if 0 and
1 if positive
 Sin: Sine
 Sqrt: Square root (sqrt(4) is equivalent to 4^(1/2))
 Tan: Tangent
