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Mathematics
Problem
The integral
∫
π
4
3
π
4
d
x
1
+
cos
x
\int_{\frac{\pi}{4}}^{\frac{3\pi}{4}} \frac{dx}{1 + \cos x}
∫
4
π
4
3
π
1
+
c
o
s
x
d
x
is equal to:
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