$\cos 15^{\circ} \cos 7.5^{\circ} \sin 7.5^{\circ}$ का मान क्या है?

  • A
    $\frac{1}{2}$
  • B
    $\frac{1}{8}$
  • C
    $\frac{1}{4}$
  • D
    $\frac{1}{16}$

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