cosx(tanx-1) -(tanx-1)=0
(cosx-1)(tanx-1)=0
cosx-1=0 ->x1=0°,x2=360°
tanx-1=0 ->x3=45°,x4= 135°
答案x1=0°,x2=360 x3=45°,x4= 135°
cosx(tanx-1) -(tanx-1)=0
(cosx-1)(tanx-1)=0
cosx-1=0 ->x1=0°,x2=360°
tanx-1=0 ->x3=45°,x4= 135°
答案x1=0°,x2=360 x3=45°,x4= 135°