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Questions  >>  CBSE XII  >>  Math  >>  Model Papers
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Q)

If \( x=a \bigg( \cos\: \theta +\log \tan\large \frac{\theta}{2} \bigg) \) and \( y = a\sin\: \theta,\) find the value of $ \large\frac{d^2y}{dx^2}$$\: at \: \theta = \large\frac{\pi}{4}.$

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