यदि $\sec \theta = \frac{13}{5}$ है,तो $\cos \theta = \ldots \ldots \ldots \ldots$

  • A
    $\frac{12}{5}$
  • B
    $\frac{5}{12}$
  • C
    $\frac{5}{13}$
  • D
    $\frac{13}{12}$

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