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Problem
Problem
Find the range of
y
y
y
such that the equation in
x
x
x
,
y
+
cos
x
=
sin
x
y + \cos x = \sin x
y
+
cos
x
=
sin
x
has a real solutions. For
y
=
1
y = 1
y
=
1
, find
x
x
x
such that
0
<
x
<
2
π
0 < x < 2\pi
0
<
x
<
2
π
.
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