Operators, Functions,
and Constants
When you use
trigonometric functions in equations, specify the angular units by selecting
Degrees or Radians
in Angular Equation Units in the
Equations
dialog box.
Operator 
Name 
Notes 
+ 
plus sign 
addition 
 
minus sign 
subtraction 
* 
asterisk 
multiplication 
/ 
forward slash 
division 
^ 
caret 
exponentiation 



Function 


sin (a) 
sine 
a
is the angle; returns the sine ratio 
cos (a) 
cosine 
a
is the angle; returns the cosine ratio 
tan (a) 
tangent 
a
is the angle; returns the tangent ratio 
sec (a) 
secant 
a
is the angle; returns the secant ratio 
cosec (a) 
cosecant 
a
is the angle; returns the cosecant ratio 
cotan (a) 
cotangent 
a
is the angle; returns the cotangent ratio 
arcsin (a) 
inverse sine 
a
is the sine ratio; returns the angle 
arccos (a) 
inverse cosine 
a
is the cosine ratio; returns the angle 
atn (a) 
inverse tangent 
a
is the tangent ratio; returns the angle 
arcsec (a) 
inverse secant 
a
is the secant ratio; returns the angle 
arccosec (a) 
inverse cosecant 
a
is the cosecant ratio; returns the angle 
arccotan (a) 
inverse cotangent 
a
is the cotangent ratio; returns the angle 
abs (a) 
absolute value 
returns the absolute value of a 
exp (n) 
exponential 
returns e raised to the power of n 
log (a) 
logarithmic 
returns the natural log of a
to the base e 
sqr (a) 
square root 
returns the square root of a 
int (a) 
integer 
returns a
as an integer 
sgn (a) 
sign 
returns the sign of a as 1
or 1
For example: sgn(21) returns 1 



Constant 


pi 
pi 
ratio of the circumference to the diameter
of a circle (3.14...) 
You can also use the Visual Basic IIf function when specifying
a model dimension. This function returns one of two values depending on
the evaluation of an expression. For example, if the equation specified
is "D1@Sketch1" = (IIf("D1@Sketch4">15,
20, 10)) + 8, then:
If D1@Sketch4
is ... 
Then D1@Sketch4
is set to ... 
And D1@Sketch1
is set to ... 
> 15 
20 
28 
<= 15 
10 
18 