serie parallel RLC circuit current
It is simpler if you use complex numbers:

octave:1&gt; R=150
R =  150
octave:3&gt; Zc=1/(j*2*pi()*1000*2e-6)
Zc =   0.00000 - 79.57747i
octave:4&gt; Zl=j*2*pi()*1000*40E-3
Zl =    0.00000 + 251.32741i
octave:5&gt; Zrl=1/(1/R+1/Zl)
Zrl =  110.603 +  66.011i
octave:6&gt; Zt=Zrl+Zc
Zt =  110.603 -  13.566i
octave:7&gt; I=15/Zt
I =  0.133611 + 0.016389i
octave:8&gt; abs(I)
ans =  0.13461
octave:10&gt; arg(I)
ans =  0.12205
octave:11&gt; Ir=I*Zrl/R
Ir =  0.091306 + 0.070883i
octave:12&gt; abs(Ir)
ans =  0.11559
octave:13&gt; arg(Ir)
ans =  0.66014
octave:14&gt; Il=I*Zrl/Zl
Il =  0.042305 - 0.054494i
octave:15&gt; abs(Il)
ans =  0.068988
octave:16&gt; arg(Il)
ans = -0.91066


I leave to you the conversion of the angle from radians to degrees