Math function: ATAN2

Subject: Math function: ATAN2
From: Elsa Kapitan-White <kapitan-white -at- SUGAR-LAND -dot- OILFIELD -dot- SLB -dot- COM>
Date: Thu, 27 Jun 1996 10:08:57 -0500

Help! A series of equations about determining inclinometry (determining
logging tool orientation) uses the term "ATAN2" as in "relative bearing =
ATAN2[g1 - g2]" and my query to the author about it was cryptically
answered "ATAN2 is a standard mathematical function." It's been a long time
since I took my last math course, so my best guess is "tan" for "tangent"
-- can anyone enlighten me? Whatzit and would I set it in italics as a
variable? Thanks!

Elsa Kapitan-White
Schlumberger Oilfield Marketing Services
225 Schlumberger Drive
Sugar Land, TX 77478
(713)275-7563, fax -8545

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