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Problem
Problem
Solve
sin
4
(
x
3
)
+
cos
4
(
x
3
)
>
1
2
\sin^4\left(\frac{x}{3}\right) + \cos^4\left(\frac{x}{3}\right) > \frac{1}{2}
sin
4
(
3
x
)
+
cos
4
(
3
x
)
>
2
1
.
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