## anonymous 5 years ago express each complex number in polar form 5.2i another problem 6+4i

1. anonymous

is 5.2i 5 + 2i or 5 - 2i

2. anonymous

nope 5.2i

3. anonymous

A complex number z in the form x+y*i is described the same way any other polar equation is:$x = R \cos\theta, y = R \sin\theta$ Where $R = |z| = \sqrt{x^2 + y^2}.$ So, in this case, x = 0, and y = 5.2. So, R is going to be 5.2. When you want to express it in polar coordinates, you end up with the form $z = R (\cos\theta + i*\sin\theta)$ (because the y component is multiplied by i).