rautdhan2 rautdhan2
  • 19-12-2020
  • Mathematics
contestada

cos^2A + sin^2A.Cos2B​

Respuesta :

surjithayer10 surjithayer10
  • 20-12-2020

Answer:

Step-by-step explanation:

cos²A+sin²A,Cos 2B

=1-sin²A+sin²A.cos 2B

=sin²A(-1+cos2B)

=-sin²A(1-cos2B)

=-sin²A. 2sin²B

=-2sin²A sin²B

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