Couple calculations Polar to Rectangular Form

[shaltera]

Homework Statement

I need to find i1+i2

Homework Equations

for i1=0.092<-98.86
i2=-4i1-j10/25=-4i1-0.4

i1=0.092<-98.86
x=rcosθ=0.092cos(-98.86)=-0.0142
y=rsinθ=0.092sin(-98.86)=-0.0909
i1=-0.0142-j0.0909

Therefor
i2=-4(-0.0142-j0.0909)-j0.4=0.568+j3636-j0.4=0.568-j0.0364i1+i2=-0.0142-j0.0909+0.568-j0.0364=0.0426-0.j1273

Covert 0.0426-0.j1273 to polar form i1+i2=0.1342<-71.4976

Correct?

The Attempt at a Solution

 

[gneill]

Your calculations look fine.