$cot 5^o - tan 5^o - 2 tan 10^o - 4 tan 20^o - 8 cot 40^o$ ની કિંમત શોધો.

  • A
    $0$
  • B
    $4 tan 40^o$
  • C
    $8 tan 40^o$
  • D
    $8 cot 40^o$

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