How do you divide #( 2i -3) / (- 6 i -8 )# in trigonometric form?

Question

1437 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-07-26T15:05:04

#color(crimson )(=> 0.12 - 0.34 i),# IV QUADRANT

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

#z_1 = -3 + 2 i, z_2 = -8 - 6 i#

#r_1 = sqrt(-3^2 + 2^2)^2) = sqrt 13#

#theta_1 = tan ^ -1 (2 / -3) = 146.3099^@ = , " II Quadrant"#

#r_2 = sqrt(-8^2 + (-6)^2) = 10#

#theta_2 = tan ^-1 (-6/ -8) ~~ 216.8699^@, " III Quadrant"#

#z_1 / z_2 = (sqrt(13) /10) * (cos (146.3099 - 216.8699) + i sin (146.3099 - 216.8699))#

#color(crimson )(=> 0.12 - 0.34 i),# IV QUADRANT