SV650.org - SV650 & Gladius 650 Forum
Page 2 of 3 1 2 3
Show 40 post(s) from this thread on one page

SV650.org - SV650 & Gladius 650 Forum (http://forums.sv650.org/index.php)
-   Idle Banter (http://forums.sv650.org/forumdisplay.php?f=116)
-   -   Hyperbolic Functions (http://forums.sv650.org/showthread.php?t=82716)

Jabba 15-01-07 09:42 PM
Re: Hyperbolic Functions
 
Quote:
Originally Posted by Fearg
:oops: :oops: :oops:
:smt056

furrybean 15-01-07 09:45 PM
It aint cubed on the assignment sheet but do u reckon it might me wrong.

I got to this

sin3θ = 3sinθ - 4sin3θ

substituting jA for θ gives

sin3jA = 3sinjA - 4(sin3jA)

since sinjA = jsinhA

jsinh3A = 3jsinhA - 4(jsinh3A)

jsinh3A = 3jsinhA - 4jsinh3A

just that negative sign!!!

Fearg 15-01-07 09:48 PM
Quote:
Originally Posted by furrybean
It aint cubed on the assignment sheet but do u reckon it might me wrong.

I got to this

sin3θ = 3sinθ - 4sin3θ

substituting jA for θ gives

sin3jA = 3sinjA - 4(sin3jA)

since sinjA = jsinhA

jsinh3A = 3jsinhA - 4(jsinh3A)

jsinh3A = 3jsinhA - 4jsinh3A

just that negative sign!!!
Personally yes I think the assignment sheet is wrong, won't be the first time! or even the last! :lol:
Don't sweat over it anymore

furrybean 15-01-07 09:50 PM
well cheers for the help. Can you go that with the 4sin3jA and put the 4 like 4(sin3jA) so it goes to 4jsinh3A

Fearg 15-01-07 10:07 PM
Quote:
Originally Posted by furrybean
well cheers for the help. Can you go that with the 4sin3jA and put the 4 like 4(sin3jA) so it goes to 4jsinh3A
Quote:
I got to this

sin3θ = 3sinθ - 4sin3θ

substituting jA for θ gives

sin3jA = 3sinjA - 4sin3jA

since sinjA = jsinhA

jsinh3A = 3jsinhA - 4jsinh3A

just that negative sign!!!
I would leave the brackets out personally (as above)

then divide thru by j

sinh3A = 3sinhA - 4sinh3A

but like you say that's not what is on your sheet

furrybean 15-01-07 10:13 PM
Ok well cheers for the help matey :thumbsup:

Fearg 15-01-07 10:36 PM
The proof is in the text book, which have just dug out and blown the cobwebs off :D



http://upload5.postimage.org/241045/Image1.jpg

furrybean 15-01-07 10:42 PM
Minter, well I now know they dont make up the qu themselves.

What book is that?

Cheers

Fearg 15-01-07 10:52 PM
Quote:
Originally Posted by furrybean
Minter, well I now know they dont make up the qu themselves.

What book is that?

Cheers
Higher Engineering Mathematics by John Bird

what are you studying? :study:

Rob S (Yella) 16-01-07 12:00 AM
The answer is

42


All times are GMT. The time now is 04:09 AM.
Page 2 of 3 1 2 3
Show 40 post(s) from this thread on one page

Powered by vBulletin® - Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.