arc cotangent

arc cotangent

 
noun Trigonometry.
the angle, measured in radians, that has a cotangent equal to a given number. Abbreviation: arc cot Symbol: cot−1
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Also called inverse cotangent.

Origin:
1905–10
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Arc cotangent is always a great word to know.
So is doohickey. Does it mean:
a gadget; dingus; thingumbob.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
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American Heritage
Science Dictionary
arc cotangent  
The inverse of the cotangent function.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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