Hi, I took the selective test for Normanhurst, North Sydney Boys and James Ruse in 2020 for year 11 entrance, and I got accepted into NSB.
These are my thoughts on the exams and how you should prepare:
Basically, just prepare for the exams and make sure you know the format. Depending on the...
for L you expand and get sin^2A+cos^2A+sin^2B+cos^2B+2sinAsinB+2cosAcosB then u use sin^2x+cos^2x=1 and
cos(A-B)=cosAcosB+sinAsinB to get 2+2(cos(A-B))then you use cos2x=2cos^2(x)-1to get 2+2(2cos^2((A-B)/2)-1)=4cos^2((A-B)/2)