Maths Question.. confused (1 Viewer)

[mrzeidan1]

please tell me where you got this

that combined question was worth 5 marks in our exam

St Pats Strathfield 2006 Extension Yearly

 

[Zozo6969]

I had the same question in my exam, and ours was an independant paper, so it is possible that many of us did exactly the same papers because the school buys them from an independant thing who creates these exams.

 

[karnoganguli]

Please explain your method soulsearcher (out of interest)... never seen that method before.

I think we had a similar question to that in our yearly exam. I got the second part but not the first. Had no idea at the time.

 

[SoulSearcher]

Double angle formula, made A+B a single angle