What is sin4θ - cos4θ equal to for any real number θ? – McqOptions

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1.	What is sin4θ - cos4θ equal to for any real number θ?
A.	1
B.	1 - 2 sin2θ
C.	2 cos2θ + 1
D.	1 - 2 cos2θ
Answer» E.

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