Question
Evaluate the following :
$\int \frac{1}{\sqrt{11-4 x^2}} \cdot d x$
$\int \frac{1}{\sqrt{11-4 x^2}} \cdot d x$
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(i) $\cos 2 \theta=\frac{1}{3}$
$\operatorname{cosec}^{-1}(2)$