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Problem
Problem
Determine all values of
a
a
a
for which the equation
cos
4
x
−
(
a
+
2
)
cos
2
x
−
(
a
+
3
)
=
0
\cos^4 x - (a+2) \cos^2 x - (a+3) = 0
cos
4
x
−
(
a
+
2
)
cos
2
x
−
(
a
+
3
)
=
0
, possesses solution. Find the solutions.
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