Final Answer
$-\frac{\sqrt{3}}{3}$
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Step-by-step Solution
Specify the solving method
1
Add the values $30$ and $120$
$\tan\left(150\right)$
2
Calculating the tangent of $150$ degrees
$-\frac{\sqrt{3}}{3}$
Final Answer
$-\frac{\sqrt{3}}{3}$