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If Cos A + Cos2 A = 1, then Sin2 A + Sin4 A=?
1.
If Cos A + Cos2 A = 1, then Sin2 A + Sin4 A=?
A.
0
B.
1
C.
$$ {1 over 2}$$
D.
-1
Answer» C. $$ {1 over 2}$$
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