Kalmar "arc cosecent" ba kalma ce da aka saba amfani da ita a yare na yau da kullum ba, amma a fannin lissafi, tana nufin aikin trigonometric. an bayyana shi azaman madaidaicin aikin sine. Ƙaƙwalwar baka na kusurwa ita ce kusurwa wanda coseent ɗinsa yayi daidai da ƙimar da aka bayar.A cikin ilimin lissafi, aikin arc cosecant ana nuna shi da "arccsc" ko "csc⁻¹". Misali, idan csc θ = 2, to θ = arccsc 2, wanda ke nufin cewa kwanar da coseent dinsa ya yi daidai da 2 shi ne arc cosecant na 2, kuma yana daidai da kusan digiri 30 ko 0.5236 radians.