Question
Without using trigonometric tables, evaluate.
$\left(\frac{\sin 39^{\circ}}{\cos 51^{\circ}}\right)^2+\left(\frac{\cos 51^{\circ}}{\sin 39^{\circ}}\right)^2$
$\left(\frac{\sin 39^{\circ}}{\cos 51^{\circ}}\right)^2+\left(\frac{\cos 51^{\circ}}{\sin 39^{\circ}}\right)^2$
