You should know that SIN^-1(theta) is read as "arcsine of theta"
So Excel has functions such as ASIN, ACOS, etc.
Look before you leap.

--
Bernard V Liengme
www.stfx.ca/people/bliengme
remove caps from email

"Mark D T Jones" <Mark D T wrote in message
...
I can take tan (A) =b of a angle, to produce a fraction, but can't work
back
to an angle using tan^-1 (b)=A

----------------
This post is a suggestion for Microsoft, and Microsoft responds to the
suggestions with the most votes. To vote for this suggestion, click the "I
Agree" button in the message pane. If you do not see the button, follow
this
link to open the suggestion in the Microsoft Web-based Newsreader and then
click "I Agree" in the message pane.

http://www.microsoft.com/office/comm...et.f unctions