1. The sine of the complement of an arc or angle.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• cocine,
• comune,
• coninue,
• coisin,
• cosinder,
• codine,
• casin,
• orsine,
• coice,
• coutine,
• cosignee,
• cotinue,
• cafine,
• coxing,
• coson,
• cosins,
• couins,
• crosing,
• cosider,
• cusinie

• cone,
• Cosier,
• cochin,
• coxswain,
• coin,
• closing,
• cousino,
• cousineau,
• coigne,
• coxon,
• coign,
• cowskin,
• cohesion,
• coggin,
• cogan,
• cocaine,
• Coins,
• cozen,
• Cosme,
• costing,
• cocain,
• cousin,
• cockney.

The adjective form of the word "cosine" is "cosine".

The plural of the "cosine" can be the "cosines".

The singular of the "cosine" can be the "cosine".