yup, thats good enough.
You can do Sin, Tan, Cos as long as you have the necessary variables like Opp, Base and Hypo. values in distances.
Good Job.
So draw the Isoceles Triangle with coordinates. Be careful where A and B points will lie and which way you are traveling in the right Rhumb Line Direction and then once found out that, then find out Coordinate C which is really simple
If A was 45 N 010 W, B is 48*30**, 15*W then C which is the side between Opp and Base of the triangle would be 45N 15W.
Then find distances of A to C using Dep= dlong X 60 X cos lat = 212NM
A-B (Hypo side) = 298.4NM and B-C = 210 NM
Then use Tan, or Sin from Point A. I took Sin
Sin A = 210/298.4 = 44.8 Degrees
Add 44.8+ 270 (A-C direction is going from 10*W to 15*W so you are going West) = 315
Yash you did good, I was just giving alternative for others if they may be confused or never done CPL exams.