robertAP robertAP
  • 19-07-2020
  • Mathematics
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How do I complete this identity? sin(2θ) sin(4θ) cos(2θ) cos(4θ) = ?

Respuesta :

bekkarmahdi702
bekkarmahdi702 bekkarmahdi702
  • 19-07-2020

Answer:

  • sin(20) sin(40) cos(40) cos(20)
  • [sin(20)*cos(20)]*[sin(40)*cos(40)]
  • [sin(2*20)/2]*[sin(2*40)/2]
  • [sin(40)*sin(80)]/2

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