# General Thoughts: Mathematics Extension 2 (1 Viewer)

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#### khorne

##### Guest
Pi ln2 + pi^2/2 - 2pi using radius (1-x) and height f(x) I think
correcto something like this

#### khfreakau

##### Member
Also guys? The circular motion question worked out perfectly - you needed to use your diagram well. It was definitely theta and not 90-theta.

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#### bobthebuilder94

##### Member
wow i totally fked up the |1+1/z| questions.......me being retarded, decided that i can split that up into |1| + |1/z| ......... which leads to |z|>=1.....leading me to shade the whole diagram hahahahahhahaahhahahahahahhahah

i rofled for a bit after the exam when i realised my stupidity

#### rawrence

##### Member
It wasn't difficult but Q3(b)...anyone remember their answer?

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#### khorne

##### Guest
Also guys? The circular motion question worked out perfectly - you needed to use your diagram well. It was definitely theta and not 90-theta.

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You found one angle, theta as parallel and since the other angle on the straight line was 180- theta because of the triangle, then the angle sum was 2 theta, thus both angles were theta. Ezy

#### ohexploitable

##### hey
mathematics extension 2: the exam that made me take up smoking again after quitting for a month

#### michaeljennings

##### Active Member
It wasn't difficult but Q3(b)...anyone remember their answer?
I remember it being small like 1/2 or 1/4? I wasnt sure if it was correct though

#### HyperComplexxx

##### ლ(ಠ_ಠ ლ)
It wasn't difficult but Q3(b)...anyone remember their answer?
i had 2 but am not sure

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#### khorne

##### Guest
It wasn't difficult but Q3(b)...anyone remember their answer?

Area of triangle = 1/2*base*h = 1/2*2cos*h

h = sqrt(1-cos^2) = sinx

Area = cos*sinx = 1/2sin2x from 0 to pi/2 = 1/2

#### rawrence

##### Member
I got a 1/2 too!!

I felt uneasy because the answer looked to simple

#### ball00n

##### Member
I remember it being small like 1/2 or 1/4? I wasnt sure if it was correct though
I got 1/2 too! *high five*

#### Implying

##### Member
Pi ln2 + pi^2/2 - 2pi using radius (1-x) and height f(x) I think
i confirm this

#### Fancy93pants

##### New Member
It's correct and the cos theta's and sine theta's align.

#### AAEldar

I got a 1/2 too!!

I felt uneasy because the answer looked to simple
Same >.< Wrote it down and was like "lol that can't be right, oh wells".

#### nichorowitz

##### Member
what happens when eccentricity-> infinity

you get two straight lines
x=+-a
?

#### rawrence

##### Member
I just bs'd that and said it turns into a straight line LUL

#### ball00n

##### Member
correcto something like this
for 7a) sorry to be annoying but how did you guys get this part? pi^ (2/2-2pi) lol i doubt anyone will bother answering this haha I'll just go check terry lee when he finishes his solution