If sin A + sin2 A = 1, then cos2 A + cos4 A = .........
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Answer:
sin A + sin²A = 1
=> sinA = 1 - sin²A
=> sinA = cos²A
=> sin²A = cos⁴A
=> 1- cos²A = cos⁴A
=> 1 = cos²A + cos⁴A
or cos²A + coa⁴A = 1
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