Let $\alpha=\frac{1}{\sin 60^{\circ} \sin 61^{\circ}}+\frac{1}{\sin 62^{\circ} \sin 63^{\circ}}+\ldo

Question

Let $\alpha=\frac{1}{\sin 60^{\circ} \sin 61^{\circ}}+\frac{1}{\sin 62^{\circ} \sin 63^{\circ}}+\ldots +\frac{1}{\sin 118^{\circ} \sin 119^{\circ}}$. Then the value of \ $\left(\frac{\operatorname{cosec} 1^{\circ}}{\alpha}ight)^{2}$ is _____

Professor PC Thomas Classes · Answer

(3) : We have,