If 2xy cosθ + (x² − y²)sinθ = x² + y², then the value of tanθ is:
\(\frac{x^2-y^2}{x^2+y^2}\)
\(\frac{1}{\sqrt{2}}\)
\(\frac{x^2-y^2}{2xy}\)
\(\frac{y^2-x^2}{2xy}\)
Find the value of \(\frac{\sqrt{144}}{7}\) × \( \frac{14}{12} \) ×\(\frac{7}{\sqrt{196}}\).