The set of angles btween $0$ & $2\pi $ satisfying the equation $4\, cos^2 \, \theta - 2 \sqrt 2 \, cos \,\theta - 1 = 0$ is
$\left\{ {\frac{\pi }{{12}}\,\,,\,\,\frac{{5\pi }}{{12}}\,\,,\,\,\frac{{19\pi }}{{12}}\,\,,\,\,\frac{{23\pi }}{{12}}} \right\}$
$\left\{ {\frac{\pi }{{12}}\,\,,\,\,\frac{{7\pi }}{{12}}\,\,,\,\,\frac{{17\pi }}{{12}}\,\,,\,\,\frac{{23\pi }}{{12}}} \right\}$
$\left\{ {\,\,\frac{{5\pi }}{{12}}\,\,,\,\,\frac{{13\pi }}{{12}}\,\,,\,\,\frac{{19\pi }}{{12}}} \right\}$
$\left\{ {\frac{\pi }{{12}}\,\,,\,\,\frac{{7\pi }}{{12}}\,\,,\,\,\frac{{19\pi }}{{12}}\,\,,\,\,\frac{{23\pi }}{{12}}} \right\}$
If $\frac{{1 - \cos 2\theta }}{{1 + \cos 2\theta }} = 3$, then the general value of $\theta $ is
The equation $\sqrt 3 \sin x + \cos x = 4$ has
If $|k|\, = 5$ and ${0^o} \le \theta \le {360^o}$, then the number of different solutions of $3\cos \theta + 4\sin \theta = k$ is
If $1 + \cot \theta = {\rm{cosec}}\theta $, then the general value of $\theta $ is
If $\tan (\cot x) = \cot (\tan x),$ then $\sin 2x =$