જો \(\frac{1}{{1\, + \,\tan \,{\rm{\theta }}}}\, + \,\frac{1}{{1\, - \,\tan \,{\rm{\theta }}}}\, = \,4,\,0^\circ < \,{\rm{\theta }}\,{\rm{ < }}\,{\rm{90}}^\circ \) , તો (cosec 2 θ + sec 2 θ) નું મૂલ્ય શું છે?
1
\(\frac{9}{2}\)
2
\(\frac{4}{3}\)
3
\(\frac{8}{3}\)
4
\(\frac{5}{2}\)