sedinalana

Verified answer

Sin²x+2sinx-3+3sin²x+1=0
sinx=a
4a²+2a=2=0
2a²+a-1=0
d=1+8=9
a1=(-1-3)=-/⇒sinx=-⇒x=-π/+πn,n∈z
a=(-+)=//⇒sinx=/⇒x=(-)^n*π/+πk,k∈z