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1295

Q:

The value of $$ cot\ {π\over 20}\ cot{3π\over 20} \cot{5π\over20}\ cot{7π\over 20}\ cot {9π\over20}$$ is:

  • 1
    -1
  • 2
    $$ {1\over 2}$$
  • 3
    0
  • 4
    1
  • Show Answer
  • Workspace

Answer : 4. "1"

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