shresthasusan44
shresthasusan44 shresthasusan44
  • 04-03-2018
  • Mathematics
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cos 4A - cos 4B = 8(cos A - cos B) (cos A +cos B) (cos A - sin B) (cos A + sin B)

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ArianaBrande ArianaBrande
  • 12-03-2018
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