(Original post by AKayaker)
Hi Mr M
For the alpha beta question there was a cheat method on the calculator
For the alpha if you did (cos(tan-1(0.4)))^2 the calculator gave you 25/29 so you could just write down the answer as sqrt(25/29)
the same thing also worked for the beta question
This method meant I had hardly any workings, will I get all the marks for the answer, also will I lose marks as I think i forgot to change both down to surds (I left them as 5/sqrt(29) and -sqrt(40)/7 ) as it didn't say in the question it had to be simplified and I stupidly forgot
(Original post by jodiedoodles)
Mr M , for the last question I must have done something stupid somewhere as I worked out y = 6, and substituting this back in got -3 (we wanted 3) . I think I've just messed my signs up somewhere, but I'm pretty sure I done the same working as my friend who got the correct answer as 2/3 (I think?)
Would I still gain method marks, and lose the answer mark? How many marks do you estimate I would lose here?
(Original post by sj_1995)
If, foolishly, I did (3+2x)^5 - (3-2x)^5 instead of plus, would I get any marks? Im sure i read somewhere in an Old OCR mark scheme there was a mark for correct working put incorrect question copying!
Or am I dreaming....
Other than that really happy with the paper!
Just lose one mark if you did your calculation correctly.
For question 4, I used the right trig identities and got to 4sin^2x - 7sinx + 3 = 0 (not sure if I've remembered it correctly) but then I must've stupidly factorised it wrong and ended up with x= 30, 150.
Do you think I'd get any of the 6 marks, seeing as my method was correct(ish)?
(Original post by halii_94)
Mr M for 7ii I got positive the answer you put not negative
How many marks would I lose?
And for 5b I misread the first 9 for 19 but did the rest ok how many marks would I lose there?