Question 1. determine whether the vectors u and v are parallel, orthogonal, or neither. u = < 10, 6> , v = < 9, 5> ? question 2. find the angle between the given vectors to the nearest tenth of a degree.

u = < 6, -1> , v = < 7, -4>

20.3°/ 10.2°/ 0.2°/ 30.3° question 3. express the complex number in trigonometric form. -6i 6(cos 0° + i sin 0°) 6(cos 270° + i sin 270°) 6(cos 180° + i sin 180°) 6(cos 90° + i sin 90°)