જો $\cos \theta, \sin \theta$ અને $\cot \theta$ સમગુણોત્તર શ્રેણીમાં હોય,તો $\sin ^9 \theta+\sin ^6 \theta+3 \sin ^5 \theta+\sin ^3 \theta+\sin ^2 \theta=$

  • A
    $2$
  • B
    $7$
  • C
    $1$
  • D
    $5$

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