I got 7 solutions or something for theta...looks like it's a fail for me.
Oh... I think this sounds right actually. I got one solution as being something like 3Th = 54+360n and the other as Th=70, and forgot to subtract from 180 degrees or whatever it should have been so I probably missed a few solutions.
The expansion would be valid, but (1+aX)^1 = 1+aX, and (1+aX)^0 = 1, so they both give no X^2 or X^3 terms and I'm sure the question said the coefficients of these were non-zero? The next part then asked you to reject one of the other two solutions (as they told you X=1/2 and this made mod(aX)>1)
I definitely got 5/2 and -1/2 though so that's good! I'm pleased if you got four solutions for theta as I thought I'd included spurious solutions or something, it looked like there were too many
I must have dropped 20-30 marks or so on this paper, plus all the style marks no doubt
aaah I missed the non-zero part. I'm confused about trig solutions will need to double check, I think I may have had more than 4,was it x+17 x+8? I'm hoping I didn't drop more than 30
Oh... I think this sounds right actually. I got one solution as being something like 3Th = 54+360n and the other as Th=70, and forgot to subtract from 180 degrees or whatever it should have been so I probably missed a few solutions.
Yeah I had the initial solution, y+360n the (180-y)+360n
I got 16 degrees for one of my theta values, I think...
yeah I came out with 16. Ill show what I did 2sin(x+17)=cos(x+8)/cos(x+17) 2sin(x+17)cos(x+17)=sin(90-(x+8)) sin(2x+34)=sin(82-x) so 2x+34=82-x... find 3x. then +360n divide by 3 then 180-3x+360n, divide by 3
yeah I came out with 16. Ill show what I did 2sin(x+17)=cos(x+8)/cos(x+17) 2sin(x+17)cos(x+17)=sin(90-(x+8)) sin(2x+34)=sin(82-x) so 2x+34=82-x... find 3x. then +360n divide by 3 then 180-3x+360n, divide by 3
I just did it on an online graphing calculator and it looks like there should be 3 solutions
Oops, I forgot to put it into radians, I'm getting Theta = 16, 64, 136, 256 using the first line of your post.
I got 4 from the graph, if i put the right things in and I remember getting those numbers Did anyone have a complete solution to the series one, not to double check what I did
My brain was utter mush, I don't think I managed to finish any of the final parts. No distinction for me.
Im thinking that the grade boundaries for a distinction might be closer to 70 than 80 this year given that a lot of people who would otherwise have scored well will have sat STEP first and then done worse in the AEA.
Im thinking that the grade boundaries for a distinction might be closer to 70 than 80 this year given that a lot of people who would otherwise have scored well will have sat STEP first and then done worse in the AEA.
I hope so, or that Warwick will take me with a merit given I get the A-levels grades I'm hoping for. A guy from last year got in with a Merit, so fingers crossed!
Im thinking that the grade boundaries for a distinction might be closer to 70 than 80 this year given that a lot of people who would otherwise have scored well will have sat STEP first and then done worse in the AEA.