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$tan(3A)=\sqrt3$ হলে, $A=$ কত?

  • (ক) $45^\circ$
  • (খ) $30^\circ$
  • (গ) $20^\circ$
  • (ঘ) $15^\circ$

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দেওয়া আছে,
$tan(3A)=\sqrt3$

বা, $tan(3A)=tan60^\circ$

বা, $3A=60^\circ$

বা, $3A=60^\circ$

বা, $A=\frac{60^\circ}{3}$

$\therefore A=20^\circ$ [Answer]

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