Question : If $0^{\circ}< \theta< 90^{\circ}$ and $\operatorname{cosec \theta} =\cot^{2}\theta$, then the value of expression $\operatorname{cosec^{4}\theta}–\operatorname{2cosec^{2}\theta}-\cot^{2}\theta$ is equal to:

Question : The value of $\frac{\sec 54^{\circ}}{\operatorname{cosec} 36^{\circ}}+\frac{\tan 70^{\circ}}{\cot 20^{\circ}}-2 \tan 45^{\circ}$ is equal to:

Question : Find the value of $\cot ^2B- \operatorname{cosec}^2B$ for $ 0<B<90^{\circ}.$

Question : If $\operatorname{tan} 15^{\circ}=2-\sqrt{3}$, then the value of $\operatorname{tan} 15^{\circ} \operatorname{cot} 75^{\circ}+\operatorname{tan} 75^{\circ} \operatorname{cot} 15^{\circ}$ is:

Question : The value of the expression