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Q:

किसी भी वास्तविक मान के लिए $${\sqrt {secθ-1}\over \sqrt {secθ+1} }=?$$

  • 1
    cotθ-cosecθ
  • 2
    secθ-tanθ
  • 3
    cosecθ-cotθ
  • 4
    tanθ-secθ
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Answer : 3. "cosecθ-cotθ"

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