In mathematics or trigonometry, a function or value that opposes or is complementary to sine; historically related to inverse trigonometric concepts.
From anti- (against) + sine. Rare or obsolete mathematical term that's been superseded by modern terminology like 'arcsine.'
Before mathematicians settled on 'arcsine' and 'inverse sine,' they called it 'antisine'—it's a ghost term showing how scientific language gets standardized over time.
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