Prove that: (cos³A - cos 3A)/cos A + (sin³A + sin 3A)/sin A

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Prove that: (cos³A - cos 3A)/cos A + (sin³A + sin 3A)/sin A
  1. Mr. Bidur Bastola
  2. Prove that: (cos³A - cos 3A)/cos A (sin³A sin 3A)/sin A
  3. Mr. Bidur Bastola
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