Y=xsin(x)+cos(x)-sin(x)+2
y`=xsin(x)+xcos(x)-sin(x)-cos(x)
y`= xcos(x)-cos(x)
y=0
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scos(x)-cos(x)
cos(x)*(x-1)=0

a) cos(x)=0
x=(pi/2)+pi*n

b) x-1=0
x=1
y=xsin(x)+cos(x)-sin(x)+2
y`=sin(x)+xcos(x)-sin(x)-cos(x)
y`=xcos(x)-cos(x)
y`=0
xcos(x)-cos(x)
cos(x)*(x-1)=0a) cos(x)=0
x=(pi/2) + pi*nb) x-1=0
 x=1