Answer
$-\dfrac{7\pi}{12} \text{ radians}$
Work Step by Step
Multiply $\dfrac{\pi \text{ radians}}{180^o}$ to the given angle measure to obtain:
$=-105 \cdot \dfrac{\pi \text{ radians}}{180^o}
\\=-\dfrac{7\pi}{12} \text{ radians}$
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