Cos Sine to the tan limit

Calculus Level 2

lim⁡x→0(cos⁡4(3x)+cos⁡x2cos⁡(2x))1tan⁡(x)= ? \large \lim_{ x \to 0} \left(\frac{ \cos ^4 (3x) + \cos x}{2\cos (2x)} \right) ^{\frac{1}{\tan (x)}} = \ ?

Kushal Patankar by Kushal Patankar
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