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Problem
Problem
The value of
lim
x
→
π
/
4
(
cos
x
+
sin
x
)
2
−
2
2
1
−
sin
2
x
\lim_{x \to \pi/4} \frac{(\cos x + \sin x)^2 - 2\sqrt{2}}{1 - \sin 2x}
lim
x
→
π
/4
1
−
s
i
n
2
x
(
c
o
s
x
+
s
i
n
x
)
2
−
2
2
is
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