यदि \( y=(\cos x)^{(\cos x)^{(\cos x) \ldots x}} \), तो सिद्ध कीजिए कि \[ \frac{d y}{d x}=\frac{...

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यदि \( y=(\cos x)^{(\cos x)^{(\cos x) \ldots x}} \), तो सिद्ध कीजिए कि
\[
\frac{d y}{d x}=\frac{y^{2} \tan x}{y \log (\cos x)-1}
\]
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