Mini-mock Paper 2 Feedback

For the Trigonometry question, you just had to know your Trig ratios sin=opp/hyp etc and apply them to the triangle. It wasn't necessary to work out the exact answer. You lost marks if you didn't give the answer as a fraction.

The question on Co-ordinate Geometry of the circle was well answered. You had to use the midpoint formula to find the centre of the circle.

Centre of S is midpoint of diameter. (1,-2)

Radius = distance fom either endpoint of diameter (e.g. (-1,-1)) to the centre (1,-2). (or half the diameter)

= √(1+1)² + (-2+1)²

= √5

Now use radius √5 and centre (1,-2) to form equation of circle:

(x – 1)² + (y + 2)² = 5

The simpson's rule was straightforward and was well answered in general.

Nobody got the probability question right - I am going to create a full post about that.

The Linear programming question was tricky, because it was easy to overlook the "number of drivers available" as a limitation. Most people who got this second inequality right got the correct solution.
NB: Don't forget that you must use simultaneous equations to find the vertex at the intersection of the two lines.

By the way, it looks like we will have only one class left before Friday, so have your questions ready.