यदि sin(𝒙+𝒚)= Cos(𝒙−𝒚)है, तब Cos2𝒙 का मान होगा ?

  • 1

    5

  • 2

    −𝟏/𝟐

  • 3

    𝟏/𝟐

  • 4

    3

Answer:- 3

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