TAN inverse in excel?

how do you write expression for Tan inverse in excel??
billengAsked:
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yu108352Connect With a Mentor Commented:
I believe the expression atan (short for arc-tangent) is what you're looking for.
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mohnshineCommented:
= 1 / Tan(Angle)
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vbkidCommented:
billenq,
what yu108352 is right

TAN(45*PI()/180) equals 1
ATAN(1) equals 0.785398 (pi/4 radians)

vbkid
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billengAuthor Commented:
well done , that stumped me for a while, i need it to complete survey program!!!
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