यदि sin𝜽=𝒑𝟐−𝟏/𝒑𝟐+𝟏 है, तो cos𝜽 बराबर है-

  • 1

    𝟐𝒑/𝟏+𝒑𝟐 

  • 2

    𝒑/𝒑𝟐−𝟏

  • 3

    𝒑/𝟏+𝒑𝟐 

  • 4

    𝟐𝒑/𝒑𝟐−𝟏

Answer:- 1

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