Trigonometry, 2ADV EQ-Bank 4 Find the exact value of \(\tan 330^{\circ}\) (1 mark) --- 3 WORK AREA LINES (style=lined) --- \(\cos 510^{\circ}\) (1 mark) --- 3 WORK AREA LINES (style=lined) --- Show Answers Only a. \(-\dfrac{1}{\sqrt{3}}\) b. \(-\dfrac{\sqrt{3}}{2}\) Show Worked Solution a. \(\tan 330^{\circ}=\tan (360-30)=-\tan 30^{\circ}=-\dfrac{1}{\sqrt{3}}\) b. \(\cos 510^{\circ}=\cos 150^{\circ}\) \(\cos 150^{\circ}=\cos (180-30)=-\cos 30^{\circ}=-\dfrac{\sqrt{3}}{2}\)