Undefined function 'ACOS' in expression

[CLE]

When running a Query in MS Access 2000, I receive the error message
"Undefined function 'ACOS' in expression". The exact expression is:

Distance PGIP Truth: ACOS(Sin([Events]![PGIP Lat])*Sin([Events]![Impact
Lat])+Cos([Events]![PGIP Lat])*Cos([Events]![Impact
Lat])*Cos([Events]![Impact Lon]-[Events]![PGIP Lon]))*6371

It runs with no problem if I use COS, but I don't want the cosine

Help lists ACOS as a valid function.

 

[Joe D]

CLE: While the arccosine or inverse cosine (ACOS) is available in Excel, it
apparently is not directly available in Access (I'm looking in Help in
A2003). It can, however, be derived. In A2003 the derivation is available
if you look up COS, then See Also, then Derived Math Functions. Perhaps
A2000 has the same Help.

Inverse Cosine Arccos(X) = Atn(-X / Sqr(-X * X + 1)) + 2 * Atn(1)

I seldom use trig functions these days, but it does seem that Microsoft
could better standardize functions across products, doesn't it.

Perhaps someone else has an easier way to get this. Or you could write your
own function for your application using this formula.

 

[Brendan Reynolds]

A previous discussion on this indicated that the derived function is not
exactly equivalent to the Excel function. I did a Google search, and came up
with the following link. The original poster in that thread reported that
this solved the problem for him ...

http://mypage.bluewin.ch/w.stucki/Programmes.htm

Here's a link to the previous discussion ...

http://groups.google.ie/group/micro...sdaovba/browse_thread/thread/aad589b6c8f5394d

--
Brendan Reynolds
Access MVP

CLE: While the arccosine or inverse cosine (ACOS) is available in Excel,
it
apparently is not directly available in Access (I'm looking in Help in
A2003). It can, however, be derived. In A2003 the derivation is
available
if you look up COS, then See Also, then Derived Math Functions. Perhaps
A2000 has the same Help.

Inverse Cosine Arccos(X) = Atn(-X / Sqr(-X * X + 1)) + 2 *
Atn(1)

I seldom use trig functions these days, but it does seem that Microsoft
could better standardize functions across products, doesn't it.

Perhaps someone else has an easier way to get this. Or you could write
your
own function for your application using this formula.

When running a Query in MS Access 2000, I receive the error message
"Undefined function 'ACOS' in expression". The exact expression is:

Distance PGIP Truth: ACOS(Sin([Events]![PGIP Lat])*Sin([Events]![Impact
Lat])+Cos([Events]![PGIP Lat])*Cos([Events]![Impact
Lat])*Cos([Events]![Impact Lon]-[Events]![PGIP Lon]))*6371

It runs with no problem if I use COS, but I don't want the cosine

Help lists ACOS as a valid function.

 

[CLE]

Thank you to both Joe D and Brendan Reynolds!
Both repsonses work. Found that creating a new module with the new
functions is a bit easier. Again, thanks to both of you.
CLE

A previous discussion on this indicated that the derived function is not
exactly equivalent to the Excel function. I did a Google search, and came up
with the following link. The original poster in that thread reported that
this solved the problem for him ...

http://mypage.bluewin.ch/w.stucki/Programmes.htm

Here's a link to the previous discussion ...

http://groups.google.ie/group/micro...sdaovba/browse_thread/thread/aad589b6c8f5394d

--
Brendan Reynolds
Access MVP

CLE: While the arccosine or inverse cosine (ACOS) is available in Excel,
it
apparently is not directly available in Access (I'm looking in Help in
A2003). It can, however, be derived. In A2003 the derivation is
available
if you look up COS, then See Also, then Derived Math Functions. Perhaps
A2000 has the same Help.

Inverse Cosine Arccos(X) = Atn(-X / Sqr(-X * X + 1)) + 2 *
Atn(1)

I seldom use trig functions these days, but it does seem that Microsoft
could better standardize functions across products, doesn't it.

Perhaps someone else has an easier way to get this. Or you could write
your
own function for your application using this formula.

When running a Query in MS Access 2000, I receive the error message
"Undefined function 'ACOS' in expression". The exact expression is:

Distance PGIP Truth: ACOS(Sin([Events]![PGIP Lat])*Sin([Events]![Impact
Lat])+Cos([Events]![PGIP Lat])*Cos([Events]![Impact
Lat])*Cos([Events]![Impact Lon]-[Events]![PGIP Lon]))*6371

It runs with no problem if I use COS, but I don't want the cosine

Help lists ACOS as a valid function.

 

[CLE]

Thank you to both Joe D and Brendan Reynolds!
Both repsonses work. Found that creating a new module with the new
functions is a bit easier. Again, thanks to both of you.
CLE

CLE: While the arccosine or inverse cosine (ACOS) is available in Excel, it
apparently is not directly available in Access (I'm looking in Help in
A2003). It can, however, be derived. In A2003 the derivation is available
if you look up COS, then See Also, then Derived Math Functions. Perhaps
A2000 has the same Help.

Inverse Cosine Arccos(X) = Atn(-X / Sqr(-X * X + 1)) + 2 * Atn(1)

I seldom use trig functions these days, but it does seem that Microsoft
could better standardize functions across products, doesn't it.

Perhaps someone else has an easier way to get this. Or you could write your
own function for your application using this formula.

When running a Query in MS Access 2000, I receive the error message
"Undefined function 'ACOS' in expression". The exact expression is:

Distance PGIP Truth: ACOS(Sin([Events]![PGIP Lat])*Sin([Events]![Impact
Lat])+Cos([Events]![PGIP Lat])*Cos([Events]![Impact
Lat])*Cos([Events]![Impact Lon]-[Events]![PGIP Lon]))*6371

It runs with no problem if I use COS, but I don't want the cosine

Help lists ACOS as a valid function.