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Nairaland Math Quiz Winner l::::::JARYEH::::::l - Education (40) - Nairaland

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Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 2:49pm On Nov 18, 2013
factorial1: @richiez...though u received the ans. late due to network prob...I had to close tab and re-open again! #Shalom
o ya quickly bluetooth ansa 2 me so dat i go write am down nd send am 2 oga richiez chapchap...i dey beg o.
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Richiez(m): 2:49pm On Nov 18, 2013
time is up....anyone can post the solution
score card loading
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by factorial1(m): 2:50pm On Nov 18, 2013
lowkey tinx sir, ntwk sucks....time ticking, 3:00p.m draws nearer... as usual I may'nt be able to participate anymore o
aysuccess99:
@factorial,kendzyma,jaryeh u guys don finish ni bluetooth me d ansa o.....
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Idenyijoshua(m): 2:50pm On Nov 18, 2013
aysuccess99:
eheya...which simcard u dey use so dat i fit send mb 2 u o...if nah mtn tell me d procedure dat i can use 2 send mb 2 u o...i crious o.
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Idenyijoshua(m): 2:51pm On Nov 18, 2013
aysuccess99:
eheya...which simcard u dey use so dat i fit send mb 2 u o...if nah mtn tell me d procedure dat i can use 2 send mb 2 u o...i crious o.
if u fit send me ba3 i go happy o. Lolz
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by jaryeh(m): 2:51pm On Nov 18, 2013
aysuccess99:
eheya...which simcard u dey use so dat i fit send mb 2 u o...if nah mtn tell me d procedure dat i can use 2 send mb 2 u o...i crious o.

I doubt if one can actually send mb,but you can rather send airtime using the MTN stuff in your menu.
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 2:52pm On Nov 18, 2013
Kendzyma: haha,nt dat its at d red o...
factorial1: lowkey tinx sir, ntwk sucks....time ticking, 3:00p.m draws nearer... as usual I may'nt be able to participate anymore o
Kendzyma: haha,nt dat its at d red o...
#yimu# if i hear......?? u no participate what? we go see nah......@factorial or bitex, post d ansa o.
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by statusnet(m): 2:53pm On Nov 18, 2013
Solution
S sin2x

From our knowledge of trig
sin2x = 1/2 (1-cos2x)

so S 1/2 (1-cos2x)

= 1/2 S 1-cos2x

=1/2 (x-sin2x/2) + c

= x/2 -(sin2x)/4 + c
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Kendzyma(m): 2:53pm On Nov 18, 2013
No b every1 do fmath 4 sec skul na..chai
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by bitex2(m): 2:53pm On Nov 18, 2013
Using integratin by substitution
let 2x be u
u=2x
du/dx=2
dx=du/2
$sinu.du/2
1/2$sinu.du
-1/2cosu=-1/2cos2x
ans -1/2cos2x + c
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 2:54pm On Nov 18, 2013
Idenyijoshua:
if u fit send me ba3 i go happy o. Lolz
b3....? owk am coming o...o ya on ur bluetooth make i send u b3...loading.........owk...loading completed...have u seen d b3.
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Kendzyma(m): 2:55pm On Nov 18, 2013
statusnet: Solution
S sin2x

From our knowledge of trig
sin2x = 1/2 (1-cos2x)

so S 1/2 (1-cos2x)

= 1/2 S 1-cos2x

=1/2 (x-sin2x/2) + c

= x/2 -(sin2x)/4 + c
hm,bado
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 2:55pm On Nov 18, 2013
statusnet: Solution
S sin2x

From our knowledge of trig
sin2x = 1/2 (1-cos2x)

so S 1/2 (1-cos2x)

= 1/2 S 1-cos2x

=1/2 (x-sin2x/2) + c

= x/2 -(sin2x)/4 + c
oga nla..me hail o.....u be guru o..nice workings...i am feeling ur calculatn swags o....

1 Like

Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 2:56pm On Nov 18, 2013
Cos2x = 1 - 2sin^2(x).
2sin^2(x) = 1 - cos2x
sin^2(x) = 1/2 - 1/2cos2x
Integral of cos2x = 1/2sin2x.
So you get 1/2(x) - 1/4(sin2x) + c
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Kendzyma(m): 2:56pm On Nov 18, 2013
bitex2: Using integratin by substitution
let 2x be u
u=2x
du/dx=2
dx=du/2
$sinu.du/2
1/2$sinu.du
-1/2cosu=-1/2cos2x
ans -1/2cos2x + c
its nt sin2x...its sin^2x
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by factorial1(m): 2:57pm On Nov 18, 2013
hmm...I got the ans. sha, praise God!
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 2:57pm On Nov 18, 2013
smurfy: Cos2x = 1-2sin^2(x).
2sin^2(x) = 1 - cos2x
sin^2(x) = 1/2 - 1/2cos2x
Integral of cos2x = 1/2sin2x.
So you get 1/2(x) - 1/4(sin2x) + c
i knw dat u wld surely get it...gbosa 4 u o...u be d boss o*latest maths guru in d world o*
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by jaryeh(m): 2:59pm On Nov 18, 2013
aysuccess99:
i knw dat u wld surely get it...gbosa 4 u o...u be d boss o*latest maths guru in d world o*

Oboi! You just dey whyn everybody for here,and na you dey lead us o.

hmmm

God dey o.
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 3:00pm On Nov 18, 2013
factorial1: hmm...I got the ans. sha, praise God!
HALLELUYAH!!!!!!!!!!! d grtst maths guru...i trust u dat u wld get d ansa bro.....*twale o,dobale fun baba*
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Kendzyma(m): 3:00pm On Nov 18, 2013
aysuccess99:
i knw dat u wld surely get it...gbosa 4 u o...u be d boss o*latest maths guru in d world o*
phd in whinin,
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 3:01pm On Nov 18, 2013
aysuccess99:
i knw dat u wld surely get it...gbosa 4 u o...u be d boss o*latest maths guru in d world o*

How about you? Did you get it?
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Kendzyma(m): 3:01pm On Nov 18, 2013
Hm.i already no d five lucky contestant...leme kip d names
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by factorial1(m): 3:01pm On Nov 18, 2013
Prof. Whyner!! I hail you ooo
aysuccess99:
HALLELUYAH!!!!!!!!!!! d grtst maths guru...i trust u dat u wld get d ansa bro.....*twale o,dobale fun baba*
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Richiez(m): 3:02pm On Nov 18, 2013
correct ans to previous question is
x/2 - sin2x/4 + C

Updated Score Card For Round4
1. :::JARYEH::: 18pts

2. :::DENNIECE1::: 20pts

3. :::IDENYIJOSHUA::: 18pts

4. :::DR.GBOY::: 20pts

5. :::FACTORIAL1::: 20pts

6. :::AYSUCCESS99::: 18pts

7. :::KENDZYMA::: 16pts

8. :::LOGODWHIZ::: 10pts

9. [url=https://www.nairaland.com/amazing%20angel]:::AMAZING ANGEL:::[/url] 14pts

10. :::SMURFY::: 20pts

ayysuccess99 pls make ur choice quickly
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 3:03pm On Nov 18, 2013
jaryeh:

Oboi! You just dey whyn everybody for here,and na you dey lead us o.

hmmm

God dey o.
if i hear.....? me leading.......? when ogas lyk deniece1,smurfy,factorial,dr.gboy dey do quiz...me i be small boy o.......even sef u ar one of d gurus 4 here o.
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by factorial1(m): 3:03pm On Nov 18, 2013
Who are those boss? You be num. 1 on the list nah
Kendzyma: Hm.i already no d five lucky contestant...leme kip d names
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 3:04pm On Nov 18, 2013
qstn 11
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by echibuzor: 3:05pm On Nov 18, 2013
.
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 3:05pm On Nov 18, 2013
aysuccess99: qstn 11
i hope d qstn wld be simple o.
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 3:05pm On Nov 18, 2013
Where's Amazing Angel?
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by factorial1(m): 3:05pm On Nov 18, 2013
chai...this kind sun dis afternoon no be shere-shere o! Stil typing... won't av time to solve again...Gosh!
Re: Nairaland Math Quiz Winner l::::::JARYEH::::::l by Nobody: 3:07pm On Nov 18, 2013
I sight my math nerds in d house o...cap's off 4 u guys...more calculus , more..

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