প্রশ্ন ব্যাংক

  • ক. Ministry of Finance
  • খ. Ministry of Tax
  • গ. Ministry of Trade and Finance
  • ঘ. None of the above
  • ক. cos θ
  • খ. cos2 θ
  • গ. 2 cos θ
  • ঘ. 2 cos2 θ
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