$8 \cos^2 x + 18 \sec^2 x$ ની ન્યૂનતમ કિંમત,જ્યાં તે વ્યાખ્યાયિત છે,તે શોધો:

  • A
    $24$
  • B
    $25$
  • C
    $26$
  • D
    $18$

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