I am comfortable with Mathematics, Science and Mechanical, however I struggle on the Electrical unit. I also take an A-level course on Mathematics

I am using revision material called Skeleton notes and I am struggling on a certain part on the Electronics side. Here is the link (

**Page 7**):

**Link**

So it's going to be this part https://ibb.co/s2skJXp (3rd last row where I have already found Inductance but not Resistance and Impedance) I have to find either the Impedance or the Resistance using the formulas below:

**These are the formulas that we're supposed to use:**

Formula that I wrote down on my Pukka pad

The section I got the formula from

Source for the 3 formulas (Page 15)

These are the answers for that question but I don't know how they got them. Link

I attempted this myself when I tried re-arranging the formula, or subbing it and re-arranging it but to no avail have I got the solution. It left me with either a math error or a higher value than the answer.

Calculator I use:

**CASIO fx-991EX CLASSWIZ**(My calculator is in degrees and in calculate mode, I did not change the settings.)

Any help is greatly appreciated.