How do you divide # (2-9i)/(6+2i) # in trigonometric form?

Question

1203 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-06-24T03:41:28

#color(crimson)(=> 1.33 ( -0.1028 - i 0.9947)#

#z_1 / z_2 = (r_1 / r_2) (cos (theta_1 - theta_2) + i sin (theta_1 - theta_2))#

#z_1 = 2 - i 9, z_2 = 6 + i 2#

#r_1 = sqrt(2^2 + 9^2) = sqrt85#

#theta_1 = tan ^ (-1) (-9/2) = -tan *-1 -4.5 = -77.47 = 282.53^@, " IV Quadrant"#

#r_2 = sqrt(6^2 + 2^2) = sqrt40#

#theta_2 = tan ^ (-1) (2/6) = 18.43^@#

#z_1 / z_2 = sqrt(85/40) (cos (282.53- 18.43) - i sin (282.53 - 18.43))#

#color(crimson)(=> 1.33 ( -0.1028 - i 0.9947)#