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Provet that Cos4A +Sin4A + 2Sin2A Cos2 A= 1 |
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Answer» Step-by-step EXPLANATION: cos⁴A+sin⁴A+2sin²Acos²A =(cos²A)²+(sin²A)²+2sin²Acos²A =(sin²A+cos²A)² =1² =1 |
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