Need help please (1 Viewer)

[hihihi]

Find the volume of the solid generated when the given curve is rotated about the x-axis:
y = cosπx between x = 0 and x = 1

where that 'n' symbol is pi.

 

[Drongoski]

Presumably, you are accelerating in maths. So what do you already know and what don't you know about how to do this question? Which part of this question is giving you a problem?

 

[hihihi]

err.....................

there is no trouble... im just not getting that answer and i dont know where im wrong....

so can you pl0x do it for me?

thx360noscopebai.

 

[hihihi]

bump

 

[jathu123]

 

[hihihi]

ya but wouldnt differentiating sin(2pi * x) give 2pi* cos(2pi*x)??

so why didnt you factor out a 1/2pi to elimante those constants?

 

[hihihi]

and sorry, my bad,, it was from 0-1/2 if thats okay :///

 

[leehuan]

ya but wouldnt differentiating sin(2pi * x) give 2pi* cos(2pi*x)??

so why didnt you factor out a 1/2pi to elimante those constants?

 

[hihihi]

how come??

cuz u can factorise the 1/2pi and then the pi's cancel and it becomes 1/4 outside the integral??

 

[leehuan]

and sorry, my bad,, it was from 0-1/2 if thats okay :///

 

[jathu123]

oh yeah soz

 

[hihihi]

OOOOOOOOOOOOOOOOOOO)o0o0o0o0o0o0o00o0O)O)O)O)O))O0o0o00000o0o0000000000o


u r 1 big good great man! yes u u great m a n i0i0i0i

thx thx thxhxhxhxhxho0o0i0

 

[hihihi]

n'd u 2 m8 r8 8/8 gr8 f8 see u @ the g8 with k8 on the d8.

 

[hihihi]

k need help with 1 more!1!!!!!!!

boiiiizzz okay here we goo000o0o

::::

Find the volume of the solid generated when the given curve is rotated about the x-axis
y = cot ((π/2)*x) between x = 1/2
and x = 1,

bounds and stuff have been pentachecked so there is no mistake on my behalf.

answer is weird as heck:

1/2(4-pi)units cubed

i got 2+pi/2

halp plox thx360noscopebai

 

[hihihi]

bump

 

[leehuan]

No need to bump after just six minutes

 

[hihihi]

soz if the bump affected u

can u solve it fully,

cuz as i implied, i got a different asnwer, so like, is it okie dokie if u can do it all for me

i know its 11:20 and u probs got idk uni or school in 5 mins but like, pl0x it wont take long

thx

p.s.s.s.s.s great u good man XDXDXD

 

[hihihi]

also need halp with this q:

π
cos^6(x) x sin(x) dx
0

upper bound is pi and lower is 0

im getting answer as zero, i kinda need explantion on how bounds change when using integrating but substiintuition

 

[Nailgun]

You have an uh...interesting way of typing.

 

[hihihi]

not the first time someone said dat 2 moi m8, but i still r8 my typing as 8/8 g'donu m8 for the r8 but im going on a d8 with k8 so see you m8 at the g8 at 8:08,