yuryur0061 yuryur0061
  • 15-02-2020
  • Mathematics
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Find sin^4(a) + cos^4(a), if cos(a) + sin(a) = 1/3

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itshugoooc
itshugoooc itshugoooc
  • 15-02-2020
answer is 49/81, or (7/9)²
step by step in the pic below
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