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Step-by-step explanation:
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Answer:
2sin2A + cos4A = 1 + sin4A
=> 2sin2A + cos4A = 1 + (sin2A)2
=> 2sin2A + cos4A = 1 + sin4A + 2sin2A
=> cos4A = 1 + sin4A
=> cos4A = (1+sin2A) (1-sin2A)
=> cos4A = cos4A
Hence, LHS = RHS
PROVED
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