If \( y=(\tan x)^{(\tan x)^{(\tan x)^{\cdots \infty}}} \)
, prove that \( \frac{d y}{d x}=2 \) a...
If \( y=(\tan x)^{(\tan x)^{(\tan x)^{\cdots \infty}}} \)
, prove that \( \frac{d y}{d x}=2 \) at \( x=\frac{\pi}{4} \).
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