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Mathematics
Mathematics
Problem
If
sin
A
+
sin
2
A
+
sin
3
A
=
1
\sin A + \sin^2 A + \sin^3 A = 1
sin
A
+
sin
2
A
+
sin
3
A
=
1
, then find the value of
cos
6
A
−
4
cos
4
A
+
8
cos
2
A
\cos^6 A - 4 \cos^4 A + 8 \cos^2 A
cos
6
A
−
4
cos
4
A
+
8
cos
2
A
.
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