2. Sketch a standard position angle with each radian measure. \( \begin{array}{lll}\text { a. } \frac{5 \pi}{4} & \text { b. }-\pi \\ \text { c. } \frac{-4 \pi}{3} & \text { d. } \frac{15 \pi}{4}\end{array} \) Convert to degrees, minutes, and seconds (DMS). \( \begin{array}{lll}\text { 3. }-2.87^{\circ} & \text { 4. } 110.51^{\circ} & \text { 5. } 48.362^{\circ}\end{array} \) Convert to decimal degrees (DD). \( \begin{array}{lll}\text { 6. }-58^{\circ} 54^{\prime} & \text { 7. } 98^{\circ} 45^{\prime} 43.2^{\prime \prime} & \text { 8. } 135^{\circ} 35^{\prime} 38.4^{\prime \prime}\end{array} \)

Solve the equation for exact solutions over the interval \( [0,2 \pi) \) \( 2 \tan 3 x=2 \) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution set is \( \left\{\frac{\pi}{12}, \frac{5 \pi}{12}, \frac{3 \pi}{4}, \frac{13 \pi}{12}, \frac{17 \pi}{12}, \frac{7 \pi}{4}\right\} \). (Type an exact answer, using \( \pi \) as needed. Type your answer in radians. Use integers or fractions for any numbers in the expression. Use a com B. The solution is the empty set.

Solve \( 8 \sin \left(\frac{\pi}{5} x\right)=4 \) for the four smallest positive solutions

(1) จงหาค่าของ \( 2 \sin 20^{\circ}+\cot 68^{\circ} \)

6 A plane flies on a true bearing of \( 280^{\circ} \mathrm{T} \) at \( 600 \mathrm{~km} / \mathrm{h} \) after taking off at 1300 hours. To the nearest kilometre, how far north of its starting position is it at 1530 hours?

When evaluating the expression \( \tan ^{-1}\left(-\frac{\sqrt{3}}{3}\right) \), the angle obtained is ...