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here sinA=1-sin²A=cos²A
cos2a=sinA
then cos⁴a=sin²a
cos²a+cos⁴a=sina+sin²a=1
ans:- 1
please mark it as brainliest
cos2a=sinA
then cos⁴a=sin²a
cos²a+cos⁴a=sina+sin²a=1
ans:- 1
please mark it as brainliest
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