arcsin(sin3)=_________
问题描述:
arcsin(sin3)=_________
若tanx=-根号2,x属于【5π/2,3π】,x=________
答
sin3=sin(π-3)π-3属于[-π/2,π/2],arcsin(sin3)=π-3
arctanx属于(-π/2,π/2),x属于【5π/2,3π】时,x=arctan负根下2+ 3π