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11 July, 16:46

What is the missing reason in Step 8? Pythagorean theorem definition of cosine substitution properties of multiplication

8. a2 = b2 - 2bccos (A) + c2 8.?

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Answers (2)
  1. 11 July, 18:16
    0
    I know the answer isn't "definition of cosine" letter B. on edge nuity. because I got it wrong.
  2. 11 July, 19:56
    0
    The answer is substitution
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