If y=(\cos x)^{2 x}, then \frac{d y}{d x} is equal to

Correct Answer is : 2(cosx)2x[log(cosx)−xtanx]

2(\cos x)^{2 x}(\sin x-x \tan x)

2(\cos x)^{2 x}[\log (\cos x)+x \tan x]

2(\sin x)^{2 x}[\log (\cos x)-x \tan x]

2(\cos x)^{2 x}[\log (\cos x)-x \tan x]

KEAM 2020 Math Paper

Question : 93 of 120

Marks: +1, -0

If y=(cos‌x)2x, then

is equal to

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