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maths p32 answers

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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.
 
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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 :(
 
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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?
 
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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
 
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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! :D

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

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
 
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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 :/
 
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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?
 
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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
 
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