Lim sin 2x(1 - cos 2x)
x-0 x^3
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teachoo.com
= lim X-0 2 (1²- cos²x) 1- cos x
= lim X-0 2 (1- cos x)(1+ cos x)
1- cos x
= lim 2 (1 + cos x) X-0
Putting x = 0
= 2 (1 + cos 0)
= 2 (1+1)
= 2x2
= 4
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