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Author: adlismel

Soalan berkaitan Matematik & Matematik Tambahan

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Post time 9-8-2005 11:12 PM | Show all posts
Tapi,cikgu add maths saya cakap kita boeh MS Excel untuk buat soalan statistik,tapi saya tidak tahu bagaimana hendk gunakan Excel..ada orang boleh bantu explain cam mana nak gunakan Excel untuk buat statistik....
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sweet.dayah This user has been deleted
Post time 10-8-2005 12:41 PM | Show all posts
cikgu saya pun ada cakap leh wat statistik guna ms excel..sy pun x pandai..nak guna..
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Post time 11-8-2005 03:23 AM | Show all posts
yeah, u can use excel. it's not that hard. tapi memula cam susah sket la.
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Post time 15-8-2005 10:06 PM | Show all posts
cam mana nak guna excel...siapa tahu bolehlah ajar saya?
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Post time 16-8-2005 07:50 AM | Show all posts
nak guna exel boleh..

tapi question is.. kalo time exam korang bleh bawak masuk laptop ke nak jawab soklan exam tu?

so eloklah mahir2kan diri dulu memahami soalan statistic dan try buat manually
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 Author| Post time 16-8-2005 02:40 PM | Show all posts
Ni soalan yang diorang bagi tu adalah soalan Projek Add Math Form 4... jadi kat sini meamng bestlah.... boleh dapat jawapan.//// student adli pun ada datang tanya......

adli bagi klu je kat dia.... soalan satu yang senang dia tak dapat jawap.. apa lagi solana yang seterusnya..

sweet.dayah di sekolah kat mana?
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Post time 16-8-2005 03:39 PM | Show all posts
isk... senang kan student zaman skarang...boleh tanya kat forum

kita 5 thn lepas pon...still terhegeh2 discuss sesama rakan sekolah je
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deepjunior This user has been deleted
Post time 17-8-2005 06:28 AM | Show all posts
giliran saya pula ye..

Verify that the problem is identity

tan^2x - sin^2x = tan^2x sin^2x

[ Last edited by deepjunior at 20-8-2005 02:51 AM ]
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 Author| Post time 19-8-2005 08:33 AM | Show all posts
tu soalan trigonometry kan
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deepjunior This user has been deleted
Post time 20-8-2005 02:46 AM | Show all posts
ntah agaknya...guna substitution je..
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Post time 20-8-2005 07:15 AM | Show all posts
Originally posted by deepjunior at 17-8-2005 06:28 AM
giliran saya pula ye..

Verify that the problem is identity

tan^2x - sin^2x = tan^2x sin^2x


tan^2x or tan(2x)?
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deepjunior This user has been deleted
Post time 20-8-2005 07:50 AM | Show all posts
tan square of x

not tan square of 2x

(tan^2)(x)
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 Author| Post time 20-8-2005 12:21 PM | Show all posts
Originally posted by Atomic_Omnikid at 7-8-2005 06:29 PM

[ii]Jika Salina mendapat markah 80,nyatakan julat markah yang perlu diperoleh oleh azlan untuk mengatasi marka Salina.


Cadangan Jawapan

[(a+b+c+d+e)/5] - [(a+b+c+d)/4] > 0

[(256 + 80) /5] - [(186 + d) /4] > 0

4(336) - (930 + 5d) > 0

-5d > -414

maka , d > 82.8
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sweet.dayah This user has been deleted
Post time 20-8-2005 10:08 PM | Show all posts
mm...me school kat smk.banting...
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sweet.dayah This user has been deleted
Post time 20-8-2005 10:09 PM | Show all posts
nyway..kat sesap[er yg dah tolong bg clue tu...
thx very2 much erk...
sori menyusahkan korg2 sume...
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deepjunior This user has been deleted
Post time 21-8-2005 06:28 AM | Show all posts
Originally posted by deepjunior at 17-8-2005 06:28 AM
giliran saya pula ye..

Verify that the problem is identity

tan^2x - sin^2x = tan^2x sin^2x



takde soalan camni ke dalam spm??
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Post time 21-8-2005 09:33 AM | Show all posts
ade. jap aku try.
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Post time 21-8-2005 10:02 AM | Show all posts
Originally posted by deepjunior at 17-8-2005 06:28 AM
giliran saya pula ye..

Verify that the problem is identity

tan^2x - sin^2x = tan^2x sin^2x



aku ubah skat notation kepada yang aku familiar sket la.

(tan x)^2  -  (sin x)^2   =  (tan x)^2  *  (sin x)^2



so, utk soklan camni, biasanya ko boleh pilih nak start dari left or right side of the equation.

aku choose nak start from the right side.

(tan x)^2  *  (sin x)^2

***(sin x)^2 = 1 - (cos x)^2    <---mesti tau identity ni

so,

(tan x)^2  *  (sin x)^2  =  (tan x)^2  *  [1 - (cos x)^2]   =   (tan x)^2  -  (tan x)^2 * (cos x)^2

*** since tan x =  (sin x)/(cos x) ,   so   (tan x)^2  =   (sin x)^2  /   (cos x)^2


so, (tan x)^2  -  (tan x)^2 * (cos x)^2    =    (tan x)^2  -  [(sin x)^2  /   (cos x)^2] * (cos x)^2    <--- cancelkan (cos x)^2 dapat

= (tan x)^2 -  (sin x)^2      <--maka terbuktilah.


p/s: baca kat sini susah sket nak faham, baik salin balik atas kertas ngan notation yang lagi mudah faham

there's a website that looks like a good reference for problems like this
http://library.thinkquest.org/17119/
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deepjunior This user has been deleted
Post time 22-8-2005 06:03 AM | Show all posts
Right!!!

Lets see what I did from the left side.

(tan x)^2  -  (sin x)^2   =  (tan x)^2  *  (sin x)^2

Since tan x =  (sin x)/(cos x) ,   so   (tan x)^2  =   (sin x)^2  /   (cos x)^2
[(sin x)^2 / (cos x)^2] - (sin x)^2

multiply (cos x)^2 on both sides we get
[(sin x)^2 - (sin x)^2 * (cos x)^2] / (cos x)^2

Since (cos x)^2 = 1 - (sin x)^2---substitute  
[(sin x)^2 - (sin x)^2 * (1 - (sin x)^2)] / (cos x)^2

multiply (sin x)^2 with  (1 - (sin x)^2 we get
[(sin x)^2 - (sin x)^2 + (sin x)^2 * (sin x)^2] / (cos x)^2

(sin x)^2 - (sin x)^2 cancel out each other, only this left
[(sin x)^2 * (sin x)^2] / (cos x)^2

since  (sin x)^2  /   (cos x)^2 = (tan x)^2 so
[(sin x)^2 * (sin x)^2] / (cos x)^2 = (tan x)^2  *  (sin x)^2

[ Last edited by deepjunior at 22-8-2005 06:05 AM ]
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6630 This user has been deleted
Post time 22-8-2005 01:25 PM | Show all posts
Azlan ialah seorang murid yang baru berpindah dari SMK Terengganu ke sekolah ini selepas ujian pertama telah diadakan.Dia hanya mengambil 3 ujian Matematik Tambahan sahaja dan memperoleh markah min 62.Satu lagi ujian Matematik Tambahanakan diadakan.Azlan akan mengambilnya sebagai ujian keempat dan Salina pula akan mengambilnya sebagai ujian kelima dan min 4 ujian sebelumnya ialah 64. Cari semua markah yang perlu dicapai oleh Azlan dalam integer bagi ujian ini supaya markah minnya melebihi markah min Salina.
Terangkan bagaimana memperoleh penyelesaian dengan menggunakan sekurang-kurangnya dua strategi.
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