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arc tan

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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American Heritage

Abbreviations & Acronyms

arc tan
arc tangent

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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"When I read of the vain discussions of the present day about the Virgin Birth and other old dogmas which belong to the past, I feel how great the need is still of a real interest in the religion which builds up character, teaches brotherly love, and opens up to the seeker such a world of usefulness and the beauty of holiness."

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