यदि X=a sec𝛉+b tan𝛉, y=b sec𝛉+a tan 𝛉, तो 𝒙𝟐−𝒚𝟐= ?

  • 1

    4ab sec𝛉.tan𝛉

  • 2

    a2-b2

  • 3

     b2-a2
     

  • 4

    𝒂𝟐+𝒃𝟐

Answer:- 2

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