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$a=22\times cot(30)$

$a=22\times \frac{cos(30)}{sin(30)}$

$a≈22\times \frac{0.154251449888}{sin(30)}$

$a≈22\times \frac{0.154251449888}{-0.988031624093}$

$a≈22\times-0.1561199521620584$

$a≈-3.4346389475652842$