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Possible Duplicate:
Define additional math operators to be typeset in roman

\arccos, \arcsin, and \arctan seem to work, but not \arcsec, \arccot, \arccsc. I'm using the following math packages: amsmath,amssymb,amsthm.

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marked as duplicate by diabonas, cmhughes, Torbjørn T., egreg, Mico Mar 15 '12 at 19:48

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these aren't defined in amsmath, which is the applicable package. but they're easily enough cloned from the definition of one of the others as they appear in amsopn.sty. (amsopn.sty is loaded automatically by amsmath.) – barbara beeton Mar 15 '12 at 17:50
up vote 12 down vote accepted

You can define them yourself, with \DeclareMathOperator. See chapter 5 of amsmaths manual.

\( \arcsec \arccot \arccsc \)
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