JEE MAIN - Mathematics Hindi (2019 - 12th April Evening Slot - No. 13)

$${\tan ^{ - 1}}\left( {{{\sin x - \cos x} \over {\sin x + \cos x}}} \right)$$ का व्युत्पन्न, $${x \over 2}$$ के सापेक्ष, जहाँ $$\left( {x \in \left( {0,{\pi \over 2}} \right)} \right)$$ है :
1
2
$${2 \over 3}$$
$${1 \over 2}$$

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