sin(-3分之14派)=
问题描述：
sin(-3分之14派)=
答
sin(-14π/3)
=sin(-2π/3)
=sin(-π/3)
= - 根号3/2
sin(-3分之14派)=
sin(-14π/3)
=sin(-2π/3)
=sin(-π/3)
= - 根号3/2