Because r represents the distance from the origin to the point, which corresponds to the modulus you know . Make a sketch, you will understand !
For the angles, it's the same, look at a sketch.
Thanks for all the help on the previous problems, I figured out all my problems! Now, I'm stuck on another kinda simple area. Converting polar coordinates to complex numbers...
Give the complex number whose polar coordinates are
If someone could just walk me through one of the problems, I would greatly appreciate it! I have 6 of these to do, and I'm pretty sure I can figure them all out if someone can provide me with a walk-through on one! Thanks, and good night! zzzz