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The equation sin^2theta=(x^2+y^2)/(2x y)...

The equation `sin^2theta=(x^2+y^2)/(2x y),x , y!=0` is possible if

A

`x = y`

B

` x = - y`

C

`2x = y`

D

None of these

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Knowledge Check

  • The equation sin^(2) theta = ( x^(2) + y^(2))/(2xy) is possible if

    A
    x=y
    B
    x= - y
    C
    2x=y
    D
    none of these

  • The equation (x+y)^(2)-(x^(2)+y^(2))=0 represents

    A
    Two mutually perpendicular lines
    B
    two parallel lines
    C
    Two lines
    D
    a circle

  • The curve represented by the equations x=sin^(2) theta, y=2 costheta is

    A
    ellipse
    B
    parabola
    C
    hyperbola
    D
    none