ધારો કે વિધેય $f(x) = 6 + 16 \cos x \cdot \cos \left(\frac{\pi}{3} - x\right) \cdot \cos \left(\frac{\pi}{3} + x\right) \sin 3x \cdot \cos 6x$,જ્યાં $x \in R$,નો વિસ્તાર $[\alpha, \beta]$ છે. તો બિંદુ $(\alpha, \beta)$ નું રેખા $3x + 4y + 12 = 0$ થી અંતર શોધો:

  • A
    $11$
  • B
    $8$
  • C
    $10$
  • D
    $9$

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