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Mathematics
Mathematics
Problem
Evaluate :
lim
x
→
0
1
−
cos
x
cos
2
x
x
2
\lim_{x \to 0} \frac{1 - \cos x \sqrt{\cos 2x}}{x^2}
lim
x
→
0
x
2
1
−
c
o
s
x
c
o
s
2
x
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