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Mathematics
Mathematics
Problem
Problem 4. Find
lim
x
→
π
2
x
−
π
2
cos
x
\lim _{x \rightarrow \frac{\pi}{2}} \frac{x-\frac{\pi}{2}}{\cos x}
lim
x
→
2
π
c
o
s
x
x
−
2
π
.
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