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Problem
Problem
Solve the equation
sin
4
x
+
cos
4
x
=
7
2
sin
x
⋅
cos
x
\sin^4 x + \cos^4 x = \frac{7}{2} \sin x \cdot \cos x
sin
4
x
+
cos
4
x
=
2
7
sin
x
⋅
cos
x
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