The equation ${\sec ^2}\theta = \frac{{4xy}}{{{{(x + y)}^2}}}$ is only possible when

  • [IIT 1966]
  • A

    $x = y$

  • B

    $x < y$

  • C

    $x > y$

  • D

    None of these

Similar Questions

Find the degree measure of the angle subtended at the centre of a circle of radius $100 \,cm$ by an arc of length $22\, cm$ ( Use $\pi=\frac{22}{7}$ ).

$\tan 1^\circ \tan 2^\circ \tan 3^\circ \tan 4^\circ ........\tan 89^\circ = $

Find the radian measures corresponding to the following degree measures:

$520^{\circ}$

$\cos 1^\circ + \cos 2^\circ + \cos 3^\circ + ..... + \cos 180^\circ = $

Which of the following is correct