myahaenftling myahaenftling
  • 27-03-2020
  • Mathematics
contestada

The expression cos 4xcos 3x +sin 4r sin 3x is
equivalent to

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Respuesta :

surjithayer10 surjithayer10
  • 29-03-2020

Answer:

Step-by-step explanation:

cos 4x cos 3x+ sin 4x sin 3x=cos(4x-3x)=cos x

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