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Problem
Problem
Evaluate
lim
x
→
y
sin
2
x
−
sin
2
y
x
2
−
y
2
\lim_{x \to y} \frac{\sin^2 x - \sin^2 y}{x^2 - y^2}
lim
x
→
y
x
2
−
y
2
s
i
n
2
x
−
s
i
n
2
y
.
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