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22 August, 08:01

Sin²A =

1 + cos²A

1 - cos²A

cos²A - 1

+4
Answers (1)
  1. 22 August, 12:00
    0
    As you know sin² (x) + cos² (x) = 1

    So sin²A + cos²A = 1

    sin²A = 1 - cos²A

    Answer is 1 - cos²A
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