QuestionWhich of the following is equivalent to $\frac{\cos (2 \theta)}{\sin ^{2} \theta}$ for all values of $\theta$ for which $\frac{\cos (2 \theta)}{\sin ^{2} \theta}$ is defined?
Select the correct answer below: $\sec \theta-2 \sin \theta \tan \theta$ $2 \cot ^{2} \theta-\csc ^{2} \theta$ $\cot ^{2} \theta-2 \cos ^{2} \theta$ $2 \sin \theta$ $\sin \theta \cos \theta-\tan \theta$