Find all the tangents to the curve `y=cos(x+y),-2pilt=xlt=2pi` that are parallel to the line `x+2y=0.`

Find all the tangents to the curve y=cos(x+y),-2 pi<=x<=2 pi that are parallel to the line x+2y=0

find all the tangents to the curve y=cos(x+y),-2pilexle2pi that are parallel to the line x+2y=0

Find all the tangents to the curve y=cos (x+y),-2 pi le x le 2 pi that are parallel to the line x+2y=0 .

Find the equation of tangents to the curve y=cos(x+y),-2pilt=xlt=2pi that are parallel to the line x+2y=0.

Find the equation of tangents to the curve y=cos(x+y),-2pilt=xlt=2pi that are parallel to the line x+2y=0.

Find the equation of tangents to the curve y = cos(x + y), – 2pi lt= x lt= 2pi that are parallel to the line x + 2y = 0.

Find the equation of tangents to the curve y = cos(x + y), – 2pi lt= x lt= 2pi that are parallel to the line x + 2y = 0.

Find the equation of tangents to the curve y=cos(x+y),-2 pi<=x<=2 pi that are parallel to the line x+2y=0

Find the equation of tangents to the curve y=cos(x+y),-2 pi<=x<=2 pi that are parallel to the line x+2y=0