inverse-cosine

inverse cosine

noun Trigonometry.

Origin:
1905–10

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet
inverse cosine

noun
the inverse function of the cosine; the angle that has a cosine equal to a given number [syn: arc cosine
WordNet® 3.0, © 2006 by Princeton University.
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00:10
Inverse-cosine is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
the offspring of a zebra and a donkey.
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