[" 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), -2pi le x le 2pi that are parallel to the line x + 2y = 0

Find the equation of tangents to the curve y = cos(x+y), -2pilexle2pi 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 equations of the tangent to the curve y=cos(x+y) which is parallel to the line x+2y=0 .

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