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JEE MATHEMATICS MCQ: DIFFERENTIATION

1 Easy
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Application +4 | -1
Consider f(x)=tan⁡−1(1+sin⁡x1−sin⁡x),  x∈(0,π2)f\left( x \right) = {\tan ^{ - 1}}\left( {\sqrt {\frac{{1 + \sin x}}{{1 - \sin x}}} } \right),\,\,x \in \left( {0,\frac{\pi }{2}} \right).
A normal to y=f(x)y = f\left( x \right) at x=π6x = \frac{\pi }{6} also passes through the point
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Correct option: B
(0, 2π3)\left( {0,\,\frac{{2\pi }}{3}} \right)
The correct answer is B ((0,,2π3)\left( {0,\\,\frac{{2\pi }}{3}} \right)) because the normal to the curve at x=π6x = \frac{\pi }{6} passes through this point.

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