mpockmon mpockmon
  • 24-03-2021
  • Mathematics
contestada

cos (B+C - A) + cos (C+ A-B) + cos( A+B+C)
= 1 + 4 cos A.cos B.cos C.​

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kaylab699 kaylab699
  • 24-03-2021
can you explain more
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king8587 king8587
  • 24-03-2021
Not sure what you are asking?!
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