ધારો કે $a$ અને $b$ અ-ઋણ વાસ્તવિક સંખ્યાઓ છે. જો $\sin x + a \cos x = b$ હોય,તો $|a \sin x - \cos x| = $

  • A
    $\sqrt{a^2 - b^2 + 1}$
  • B
    $\sqrt{b^2 - a^2 + 1}$
  • C
    $\sqrt{1 + a^2 + b^2}$
  • D
    $\sqrt{a^2 + b^2 - 1}$

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