maths p32 answers

[2pac]

Q7 i 1+3i/1-2i =u , simplify
iiplot a b c where a=u b= 1+3i c=1-2i
iii)prove that 4pie/3 =( tan^-1)(2) +(tan^-1)3

I remember the denominator being 10 so that can't be the question.perhaps the other way round.

 

[2pac]

part iii was tan inverse of 3.

And beststriker - yes, i think that was it if i remember correctly.

do u remember your binomial answer?

 

[sweetyrox]

answer for volume part was pie/2(e2-1)
for iteration part was 1.32 as far as i remeber.
two stationary points were 15 and 75 degrres,too bad i gave answers in degrees they were suppose dto b given iin radian
in complex part u was 1/2 +1/2i
in vectors part 2 lembda was2

i also gave da answer in degrees

 

[sweetyrox]

i) was the ans to the complex part was -1/2 + 1/2i ??

yesss

 

[sparten]

t

i) was the ans to the complex part was -1/2 + 1/2i ??

yes

 

[sparten]

i also gave da answer in degrees

poor us, v vl loose one mark for this

 

[smzimran]

Why are you people discussing?
It would dishearten all of us as we get to know the answers we did wrong!

Nothing can change now,
Just resort to Allah now!

 

[sparten]

Do you remember which identity ? i guess i missed this one? was it something like sin2x?

yes at the end it came down to sin2x= something

 

[Bushrafareed]

yes at the end it came down to sin2x= something

Oh thank god , that means I did that question..

 

[ALM&B]

who remembers the answer for these questions?

1.dy/dx=e^(2x+y) ???
2.prove that cosec2x= secx + cotx ..after the proving what were the angles?

 

[sparten]

an

Oh thank god , that means I did that question..

and wat was ur volume?

 

[sparten]

Oh thank god , that means I did that question..

an do u remeber volume?

 

[Bushrafareed]

an
and wat was ur volume?

i don't remember my answer.. :/

 

[sparten]

who remembers the answer for these questions?

1.dy/dx=e^(2x+y) ???
2.prove that cosec2x= secx + cotx ..after the proving what were the angles?

i guess two angle were 200 soome thing and 323
i dnt remeber answer for diiferntial equation but u had to split it like e^2x.e^y

 

[ALM&B]

i guess two angle were 200 soome thing and 323
i dnt remeber answer for diiferntial equation but u had to split it like e^2x.e^y

It looks like I got the angles wrong ..but they wont cut all the marks!
YAY yesss I split it this wayyy!

even the first question
ln(x+1)=2 ln(x-1)
I did
(x+1)=e^(2 ln(x-1))
haha I dont think this is ryte..u did the same?

 

[smzimran]

It looks like I got the angles wrong ..but they wont cut all the marks!
YAY yesss I split it this wayyy!

even the first question
ln(x+1)=2 ln(x-1)
I did
(x+1)=e^(2 ln(x-1))
haha I dont think this is ryte..u did the same?

Its like this:

ln(x+1)=2 ln(x-1)
ln(x+1)= ln[(x-1)^2]

(x+1)= (x-1)^2

 

[sweetyrox]

poor us, v vl loose one mark for this

I just hope that dey cut just one mark bcause da next part of finding the nature of the stationery points was also related to dis and in tht i used degrees again although i ended up getting da rite answer as maximum but still i m worried dat i mite loose marks fr using degrees :/

 

[1357913579]

Why are you people discussing?
It would dishearten all of us as we get to know the answers we did wrong!

Nothing can change now,
Just resort to Allah now!

Exactly
shayatin (not sure about the spelling) forces us to and we ....

 

[sarahkhan]

I did the same
ln(x+1)=2 ln(x-1)
ln(x+1)= ln[(x-1)^2]

(x+1)= (x-1)^2

but i was getting x as 7 or -6
not 2.3, what did i do wrong?

 

[sparten]

I just hope that dey cut just one mark bcause da next part of finding the nature of the stationery points was also related to dis and in tht i used degrees again although i ended up getting da rite answer as maximum but still i m worried dat i mite loose marks fr using degrees :/

lol i did the same