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  • 19-04-2021
  • Mathematics
contestada

factorise cos^2a - sin^2a​

Respuesta :

23janelledubin 23janelledubin
  • 19-04-2021

Answer:

cos(2a)

Step-by-step explanation:

cos²(a)-sin²(a)=cos(2a)

cos²(a)-sin²(a)

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