\(\frac{1}{{1\, + \,\tan \,{\rm{\theta }}}}\, + \,\frac{1}{{1\, - \,\tan \,{\rm{\theta }}}}\, = \,4,\,0^\circ < \,{\rm{\theta }}\,{\rm{ < }}\,{\rm{90}}^\circ \) అయిన, (cosec2 θ + sec2 θ) విలువ ఎంత?
1
\(\frac{9}{2}\)
2
\(\frac{4}{3}\)
3
\(\frac{8}{3}\)
4
\(\frac{5}{2}\)