`sec^2theta=(4x y)/((x+y)^2)` is true if and only if `x+y!=0` (b) `x=y ,x!=0` `x=y` (d) `x!=0,y!=0`

sec^(2)theta=(4xy)/((x+y)^(2)) is true if and only if x+y!=0 (b) x=y,x!=0x=y( d ) x!=0,y!=0

If sec^(2)theta=(4xy)/((x+y)^(2)) is true if and only if x+y!=0( b) x=y,x!=0(c)x=y(d)x!=0,y!=0

sin^(2)theta=(4xy)/((x+y)^(2)) is true if and only if (A)x-y!=0(B)x=-y(C)x=y(D)x!=0,y!=0

If sec^(2)theta=4x(y)/((x+y)^(2)) then how many pairs of x and y are there for which the condition x!=y is true

Prove that sin^(2)theta=((x+y)^(2))/(4)xy is possible for real values of x and y only when x=y and x!=0.

x=2,y=-1 is a solution of the linear equation x+2y=0 (b) x+2y=42x+y=0 (d) 2x+y=5

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

Find the equation of the tangent line to the curve y=(3x^2-1)/x at the point (1,2) is (a) 4x-y-1=0 (b) 4x+y+2=0 (c)x-y-1=0 (d) 4x-y-2=0

The equation of the transvers axis of the hyperbola (x-3)^(2)+(y+1)^(2)=(4x+3y)^(2) is x+3y=0 (b) 4x+3y=93x-4y=13 (d) 4x+3y=0

The point of intersection of the tangents of the parabola y^(2)=4x drawn at the endpoints of the chord x+y=2 lies on (a)x-2y=0 (b) x+2y=0( c) y-x=0 (d) x+y=0