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  1. A

    Maths Ext 2 Predictions

    is this textbook any good?
  2. A

    if i rank 1 internally and i get the number 1 mark externally, does my cohort not matter?

    cohort does not matter
  3. A

    Maths Ext 2 Predictions

    I saw a trial exam question about i^i and considering different arguments for i to arrive at different answers. this has to do with different branches of the principle argument and how e^x is 2pi*i periodic. is this oos?
  4. A

    Maths Ext 2 Predictions

    2
  5. A

    Maths Ext 2 Predictions

    you might but always just imagine worst case scenario so it cant turn out worse than you expect
  7. A

    Maths Ext 2 Predictions

    the easiest way to do 10 is to get |a+b+c|^2 = (a+b+c).(a+b+c) = 3 + 2a.c so a.(a+b+c) = |a||a+b+c|cos(t) --> 1+a.c = sqrt(3+2a.c)cos(t) --> cos(t) = (1+a.c)/sqrt(3+2a.c). Now if a = c, then cos(t) = 2/sqrt(5) which is biggest value cos(t) can be under this restriction, thus the smallest angle...
  8. A

    Maths Ext 2 Predictions

    1/k log(2v0 / (2v0 - kd))
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