हल कीजिए – 
1- (cos2 𝛉)/(𝟏+𝒔𝒊𝒏𝛉)=?
 

  • 1

    𝒔𝒊𝒏𝛉

  • 2

    𝒄𝒐𝒔𝛉

  • 3

    1

  • 4

    0

Answer:- 1

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