sin4A - cos4A = 1, then A/2, in degree, is (0 < A ≤ 90°) - – McqOptions

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1.	sin4A - cos4A = 1, then A/2, in degree, is (0 < A ≤ 90°) -
A.	60
B.	30
C.	40
D.	45
Answer» E.

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