MCQ
${\tan ^2}\theta + {\cot ^2}\theta = . .. .$
- ✓$ \ge 2$
- B$ \le 2$
- C$ \ge - 2$
- Dએકપણ નહિ.
$\Rightarrow {x^2} + \frac{1}{{{x^2}}} - 2 \ge 0$
Put $x = \tan \theta \Rightarrow {\tan ^2}\theta + {\cot ^2}\theta \ge 2$.
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