sin25° + sin210° + sin215° +………..+ sin2 85°+sin290° का मान क्या है –

  • 1

    7 𝟏/𝟐
     

  • 2

    8 𝟏/𝟐

  • 3

     9

  • 4

    9 𝟏/𝟐

Answer:- 4

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