$\operatorname{cosec} 40^{\circ} = \ldots \ldots \ldots \ldots$

  • A
    $\sin 50^{\circ}$
  • B
    $\sec 50^{\circ}$
  • C
    $\cot 40^{\circ}$
  • D
    $\sin 40^{\circ}$

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$\sin^{2} 60^{\circ} - \tan 45^{\circ} + \cos^{2} 30^{\circ} - \cot 90^{\circ} = \ldots$

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