The expression $(1 + \tan x + {\tan ^2}x)$ $(1 - \cot x + {\cot ^2}x)$ has the positive values for $x$, given by
The expression $(1 + \tan x + {\tan ^2}x)$ $(1 - \cot x + {\cot ^2}x)$ has the positive values for $x$, given by
- A
$0 \le x \le \frac{\pi }{2}$
- B
$0 \le x \le \pi $
- C
For all $x \in R$
- D
$x \ge 0$
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