# Mat 2023

Scroll to see replies Original post by Theacty119
Anyone know how the Multiple choice for that how many number of root for cx^2 +ax+b works I got 2 real root cause it’s just guess work lmao

0 roots i think? i remember b=c coming up, and then doing some ******** to deduce a^2 - 4bc was negative. swear i remember a = -(b+c)/2 as well but idk lmao Original post by Anonymous
pretty sure the key idea was just to utilise the fact that cos(90-x) = sin(x).

i dont remember the exact expression, but there were two brackets multiplied iirc, one was (1 - cos^2(2x-60)) and the other (3-cos(150-2x))
by applying the identity to the left bracket, you get (1-sin^2(150-2x)) = cos^2(150-2x) which leaves the expression in a form previous to the prior part, but with something to the power of 4 instead?

anyways i got an answer of 16^4 = 4^8 = 2^16. If you know the expression, I could explain it probably, but i'm pretty confident it was maximised when cos(150-2x) = -1.

omd yeah that makes sense i shioldve seen that. i got the right answer just by inspection p much but idt they'll give me many marks. at least 1 out of the 6 but idk it could also be 6/6 if I'm v lucky. Original post by Anonymous
0 roots i think? i remember b=c coming up, and then doing some ******** to deduce a^2 - 4bc was negative. swear i remember a = -(b+c)/2 as well but idk lmao

yeah exact same for me M was 3/2 right? Lmao Original post by Anonymous
M was 3/2 right? Lmao

yeah i got that   Original post by Anonymous

what did you get for square number one Original post by Anonymous
what did you get for square number one

it was the one ending with 25 iirc Original post by Anonymous
it was the one ending with 25 iirc

yh me too but did you guess? i guessed it looked like the only good option Original post by Anonymous
yh me too but did you guess? i guessed it looked like the only good option

nah i looked at the last digit. either 1,4,5,6,9 or an even number of zeroes at the end. all the options can be eliminated except the one ending with 5 Original post by Anonymous

I got the same I think except for J which I guessed, what was question C though cos I forgot what I chose for that? Original post by Revi64
I got the same I think except for J which I guessed, what was question C though cos I forgot what I chose for that?

it was the circles in a square question. 2-sqrt2 Original post by Anonymous
it was the circles in a square question. 2-sqrt2

what do you think your'e gonna get /100? anyone happen to remember all the mcqs? im missing 3 and have 0 recollection whatsoever lmao Original post by Anonymous
it was the circles in a square question. 2-sqrt2

yep that's what I got, thanks! Original post by Anonymous
anyone happen to remember all the mcqs? im missing 3 and have 0 recollection whatsoever lmao

which ones have you got? does anyone know when the paper will be released? Original post by Anonymous
which ones have you got?

square number
integral floor function
find M
number of roots discriminant
closest log to integer
the power of 3^10 bs Original post by Anonymous
square number
integral floor function
find M