pabitragurung21
pabitragurung21 pabitragurung21
  • 07-12-2020
  • Mathematics
contestada


If A+B+C=180
c) cos A + cos B + cos C = 1+4 sinA/2sinB/2sinC/2
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Sueraiuka
Sueraiuka Sueraiuka
  • 07-12-2020

Step-by-step explanation:

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