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Problem
Problem
Find the general solutions of the equation
(
cos
x
4
−
2
sin
x
)
sin
x
+
(
1
+
sin
x
4
−
2
cos
x
)
cos
x
=
0.
\left( \cos \frac{x}{4} - 2 \sin x \right) \sin x + \left( 1 + \sin \frac{x}{4} - 2 \cos x \right) \cos x = 0.
(
cos
4
x
−
2
sin
x
)
sin
x
+
(
1
+
sin
4
x
−
2
cos
x
)
cos
x
=
0.
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