1.

If cotθ + tanθ = 2secθ, 0°< θ < 90°, then the value of \(\frac{{{\rm{tan}}2{\rm{\theta }} - {\rm{sec\theta }}}}{{{\rm{cot}}2{\rm{\theta \;}} + {\rm{\;cosec\theta }}}}\) is:

A. \(\frac{{2\sqrt 3 - 1}}{{11}}\)
B. \(\frac{{3 - \sqrt 2 }}{{11}}\)
C. \(\frac{{2\sqrt 3 - 2}}{{11}}\)
D. \(\frac{{3 - \sqrt 2 }}{5}\)
Answer» B. \(\frac{{3 - \sqrt 2 }}{{11}}\)


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