Maths C2 discussion!! :)

[Hamzeh S]

guys how many marks for finding the min point ??

 

[ahmed soliman]

not 13 marks lol it was 4 or 5 for this part

i meant the whole question

 

[Hamzeh S]

i meant the whole question

it was only 2 parts i think ? 5 for differentation and finding x and y and 2 or 3 for determining the nature

 

[n00bfi]

Exam was good, the only thing I'm concerned about is the length of PT; I got a surd...

 

[Hadi Murtaza]

yh...i got 128/3+(-20/3)

Actually u'r answer is wrong becuz u had to change - 20/3 into + 20/3, and then add to 128/3 to get 148/3

 

[Hadi Murtaza]

The g(Y) was y=1 and y=0.31

Actually it wuz 0.37

 

[Hadi Murtaza]

What angles did u guys get for the last cos question?

Angles were 72 , 144 , 216 and 288

 

[Hadi Murtaza]

some of my answers
area garden - 262.5
perimeter - 80.2
area graph - 148/3
minimum point - 4,-28
a^5/8

All u'r answers r correct except da area of da garden

 

[Hadi Murtaza]

O

All u'r answers r correct except da area of da garden

Or maybe i'm wrong

 

[abdelrahman hisham]

Guys the length of pt was 12.1 right?? And does anyone remmember what was point p??

 

[DC1313]

All u'r answers r correct except da area of da garden

triangle area: 0.5 x 23 x 12 x sin0.64 --> 82.4
sector area: 0.5 x 12 x 12 x (pi - 0.64) --> 180.1

total area: 82.4 + 180.1 = 262.5

why is this wrong?

 

[abdelrahman hisham]

The area is 260 sth and perimeter is 82. Sth

 

[Cell_ar]

i got P=20, root 5 squared=5^2 + PT^2, there for PT=root 400 which is 20

 

[Manasa]

i got P=20, root 5 squared=5^2 + PT^2, there for PT=root 400 which is 20

i got 8 sq root 2.. :/

 

[abdelrahman hisham]

I did square root of root 173 squared minus 5 squared i got 12.1

 

[abdelrahman hisham]

We had the raduis and the hypotnuse we could calculate it from the length formule so i got it root 173 then i did pythagoras

 

[bas007]

Did everyone get 6.249 or something by using trapezium rule and then when f(x)+4 it was shifted up 4 units so you add the new area which was 4*3=12 giving 12+6.249 = 18.2?

 

[abdelrahman hisham]

I did that and got 18.2 and would somebody plz answer my question what was point p

 

[bas007]

I did that and got 18.2 and would somebody plz answer my question what was point p

Point P was (8,-7)

 

[abdelrahman hisham]

Okayy thank you so is what i said correct??? i got 12.1