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JEE MATHEMATICS MCQ: LIMITS

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Application +4 | -1
If lim⁡x→0{1+xln⁡(1+b2)}1/x=2bsin⁡2θ\lim \limits_{{x \rightarrow 0}}\left\{1+x \ln \left(1+b^2\right)\right\}^{1 / x}=2 b \sin ^2 \theta, b>0b>0 and θ∈(−π,π]\theta \in(-\pi, \pi], then the value of θ\theta, is
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Correct option: D
±π2\pm \frac{\pi}{2}
Option D (±π2\pm \frac{\pi}{2}) is correct because by simplifying the given limit equation, we find that sin⁡2θ=1\sin^2 \theta = 1, which leads to θ=±π2\theta = \pm \frac{\pi}{2}.

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