C2 Maths AS aqa 2016 (unofficial mark scheme new)

5+3costheta I think

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Good lord no. I only retook C2 and my scores C1 and M1 from 2015 are staying as they are. My new C2 score will replace my 2015 paper score giving me a new total overall mark for C2.

Three cheers for resits*

*Resits are for naughty buggers who don't try hard enough/do enough work the first time (Ahem me last year when I decided to do no past papers for C2. Worked well didn't it. Ha. Ha.)

I did stretch in the X direction by SF -1 for the (0.2)^x question as I didn't think reflections were in the core 2 syllabus, will they allow both answers? As surely they're both correct

Fully agree with the markscheme except for two minor points.The radius of the sector was 5.829 but still leads to the answer for the perimeter of 13.8cm.The logs question, y should be 1/2(m-12n) not 1/2(m+12n) as currently stated.

I'm just thinking c3 and c4 gonna hard as fuak. Even though it's usually pretty easy. :c

I believe they will be more challenging papers than 2015 but still not horrific; preparation (not just confidence) is the way forward. I'm slightly concerned with C4 as I usually need the full 90 minutes allocated meaning I can't check my previous work and correct erroneous answers but I'll get there.

Use your half-term wisely!

The radius of the sector was 0.586 (It was a prove question)

I agree with you that y= m/2 - 6n

Just hate that they are two days apart . I can usually finish early; but I'm assuming it will be similar difficulty which is probably unlikely.

Angle of the sector was 0.586*.

Unoffical Mark scheme for C2 AQA 2016

It would help if you could correct the amount of marks in each question if it is wrong please

Questions:

1)a) integrate something to get -36x^-1 + ax² /2 [3]
b) find the value of a when the answer to 1)a) is equal to 16 with limits of 3 to 1, a = - 2 [2]

2)a) Draw the graph of (0.2)^x and state where it crosses axis (0,1) [2]
b) use logarithms to solve (0.2)^x = 4 , x = -0.861 [2]
c) describe transformation of (0.2)^x onto (5)^x reflection in y axis [1]

3)a) differentiate something to get 3x^-1/2 -1 [2]
b) find y co-ordinate of the maximum point M M(9,6) [3]
c) equation of normal to curve at P i think P was (5,6) y=-2x+13 [2]
d) the normal to curve at P is translated by (0,k) find value of k, k = 5.5 [3]

4)a) show that a+10d=8 [2]
b)sum to 2nd and 3rd term is 50, work out the 12th term of the series D=-2 and A=28, u12 = 6 [3]
c) work out the sum of the 21st term minus sum of 3rd term = 90 [3]

5)a) show that thetha (in radians) was 0.568 [2]
b) work out area of triangle 19.9 [2]
c) work out perimeter of shaded area, first piece of info given -> area of sector = area of shaded area

you had to realise that the area of sector = area of triangle - area of sector
re-arrange to get 2(area of sector) = 19.9 and solve for r to get 5.36?
perimeter of shaded = (9-r) + (8-r) + 5 + (length of arc = r*theta)
perimeter of shaded = 13.8 [6]

6)a)trapezium rule to get 65.6 [4]
b) describe transformation of graph y=(x² +9)^1/2 onto y = 5 + (x² +9)^1/2
Translation by (0, 5) [2]
c) describe transformation of graph y=(x² +9)^1/2 onto y=3(x² +1)^1/2 Stretch by scale factor 1/3 in x direction [2]

7)a) expand (2+x)⁵ work out p q r, i think p was 10 q was -80 and r was 80 (correct me if im wrong) [4]
b)find the coefficient of x¹⁰ in the expansion of (2+x)⁵ * (something else)⁷
it was something like -1648 [5]

8)a)find the value of tan(x) tan(x) = -5/4 [2]
b) values of tanx in the range of 0 to 360 degrees 45, 129, 225, 309 [3]
b) re-arrange 16+9sin²x / 3 - 5cosx into the form p + qcosx and find the min value = 2, this is when x is equal to pi [4]

9)re-arrange something into the form (c)^1/2 / d^2 to get 3^y y = 1/2 ( m + 12n) [4]
b) find the one and only solution of something, x = 5/2 ( you should get two equal roots i think) [4]

I believe that question 5a) said to expand the binomial equation and show it in its simplest form which cant you divide the expansion in your answer by 8 to show it in its simplest form.

What would I need to get in my Decisions exam (D1) to achieve an overall grade of a B? Providing I got 54/75 on C1 and 52/75 on C2. Thankss