[" equation of a tangent to the hyper "],[-5y^(2)=20" parallel to the line "x-y=],[x-y+9=0],[x-y+7=0],[x+y+1=0],[x-y-3=0]

The equations of the tangents to the circle x^2+y^2=a^2 parallel to the line sqrt3x+y+3=0 are

The equation of the tangent to the parabola y^(2) = 8x, which is parallel to the line 2x-y+7=0 ,will be

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 tangent to hyperbola 4x^2-5y^2=20 which is parallel to x-y=2 is (a) x-y+3=0 (b) x-y+1=0 (c) x-y=0 (d) x-y-3=0