Answer: coses

AnswerCrossword Clue
COSESFriendly chats: Var.
COSESHas a friendly chat: Var.
COSESChats
COSESTriangle ratios
cosesthe sine of the complement of a given angle or arc
cosesto converse in a friendly way; chat
coses(in a right triangle) the ratio of the side adjacent to a given angle to the hypotenuse
cosesCOSE, to make oneself cosy
cosesfriendly talk; chat