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If M is the midpoint of the side BC of triangle ABC. Let vector AB =a and vector AC = b a ) Find vectors AM and CM in terms of a and b i got AM = (3b+a)/2 , CM=(a+b)/2 part b) Show that |AM|^2 +|CM|^2 = 1/2 (|AB|^2 + |AC|^2) Need help with part b, I tried to sub in the vectors into the...

Wanted to ask how to do this question. In the argand diagram below, Point P lies in the first quadrant on the unit circle. P represents the complex number w and z=w is a root of z^5=1. anglePOx=theta (I have not included the diagram, which is only a unit circle with a vector labelled P with...

hey I was wondering if you could do part ii) using triangle inequalities instead of graphically? I know the first part is doable. Thanks.

After finishing my first term of year 12, my marks aren't looking great. I'm particularly concerned about my maths extension 2 mark, which I got 58% in my Proofs test, the average was 66%. I'm aiming for a high atar and I'm not sure I can even recover from this, this task was weighted 20% so I...