\(\frac{\cos^{2}\left(45^{\circ}+\theta\right)+\cos^{2}\left(45^{\circ}−\theta\right)}{\text{cosec}^{2} 30^{\circ} \sin^{2} 45^{\circ}−\sec^{2} 60^{\circ}}\) का मान ज्ञात कीजिए।
1
\(−\frac{1}{2}\)
2
\(−\frac{1}{6}\)
3
\(\frac{1}{6}\)
4
\(\frac{1}{2}\)