4. Change 2+j2 to polar form. A. 2(cos 45 + i sin 45) B. 2 (cos 45- I sin 45) C. 2 (cos 45 + i sin 45) D. 2 (cos 45 - i sin 45) 5. Perform the indicated operation, leave the answers in the rectangular form a + bi. (3 + 1)(5 + 4i) A. 15+ 7i B. 11 + 171 C. 11-71 D. 12 + 5i 6. The horizontal and vertical components of a vector are 10 meters and 24 meters respectively. Find the magnitudes of the resultant vector and the angle that it forms with the horizontal. What is the angle that it forms with the horizontal? A. 43 B. 47 C. 67 D. 23 7. Solve for the unknown part of the triangle, if it exists. If a = 50, b = 42, and C = 124, then what does B = ? A. 37 30' B. 25 20' C. 30 20' D. 53 0' 8. Solve 16x=4 A. 1 B. 2 C. 1/1/1 2 18 D. - 1/1/1