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Question Number 109769 by Karani last updated on 25/Aug/20

$$\underset{x\to \mathrm{\Pi }}{\lim }\frac{1-\cos x\cos 2x\cos 3x}{1-\cos x}=?$$

Answered by bemath last updated on 25/Aug/20

$$△\frac{\mathrm{♭}ϵ}{math}▽$$$$\underset{x\to \pi }{\lim }\frac{1-\cos \pi .\cos 2\pi .\cos 3\pi }{1-\cos \pi }=\frac{1-(-1)\left(1\right)(-1)}{2}=0$$

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