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prove that cosπ/15.cos2π/15.cos3π/15.cos4π/15.cos5π/15.cos6π/15.cos7π/15=1/18

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prove that cosπ/15.cos2π/15.cos3π/15.cos4π/15.cos5π/15.cos6π/15.cos7π/15=1/18
  • 1 answers

Sharmi Mandal 4 years, 10 months ago

Someone answer it.. please ?
http://mycbseguide.com/examin8/

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