Recent content by blues1

if i remember correct everything is positive from 0 to pi/2, in pi/2 to p only the sin is positive, cos is positive from p to 3pi/2 so if I get a negative θ and z for example is from 0 to pi/2 I should just have tan^-1(b/a) if I am from pi/2 to p, I should have p - tan^-1(b/a) from p to...

Homework Statement if z = -2 + 2i find r and θ The Attempt at a Solution our teacher told us that when we have z = a + bi r = sqrt(a^2 + b^2) and θ = tan^-1(b/a) so here it's supposed to be r = sqrt(8) and θ = - pi/4 but using wolfram alpha to see if the results are...