Question 19 - Next Generation Advanced Algebra and Functions Practice Test for the ACCUPLACER Test

If \(\theta\) is an obtuse angle and \(\cos\;\theta = -{\frac{\sqrt{3}}{2}}\) in Quadrant III, what is \(\sin^2\;\theta - \tan^2\;\theta + \sec\;\theta - \sin\;\theta\)?

\[-\frac{12\sqrt{3}}{17}\]
\[-\frac{5\sqrt{3}}{4}\]
\[\frac{-7\sqrt{3}}{6}\]
\[\frac{5-8 \sqrt{3}}{12}\]

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