निम्नलिखित में से कौन सा संभव है?

  • A
    $\sin \theta = \frac{a^{2}+b^{2}}{a^{2}-b^{2}}, (a \neq b)$
  • B
    $\sec \theta = \frac{4}{5}$
  • C
    $\tan \theta = 45$
  • D
    $\cos \theta = \frac{7}{3}$

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