Excel does trig in radians hence the 180/PI()
To save you remembering which way to do this use the conversion function
So to find the Tan of 60 or of degree value in A1
=TAN(RADIANS(60)) or TAN)RADIANS(A1)
and to find the inverse tan (we oldies you we brought up with log 7 trig
paper tables call that the 'arc-tan')
=DEGREES(ATAN(A2)
best wishes
--
Bernard V Liengme
www.stfx.ca/people/bliengme
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"emma" wrote in message
...
Hi, I have to calculate TAN y angle and I on my scientific calculator i
would
do 8.391/14.142 *inv tan and get 30.68 degrees. I cannot seem to find out
how
to do this in excel. Please help.