1.

What is \(\sqrt {\frac{{\sec x - \tan x}}{{\sec x + \tan x}}} \) equal to?

A. \(\frac{1}{{\sin x + \cos x}}\)
B. \(\frac{1}{{\tan x + \cot x}}\)
C. \(\frac{1}{{\sec x + \tan x}}\)
D. \(\frac{1}{{cosec\;x + \cot x}}\)
Answer» D. \(\frac{1}{{cosec\;x + \cot x}}\)


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