Question :

Find the value of a and b in order that

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- December 3rd 2009, 03:40 PMzorroFind the value of the a and b
Question :

Find the value of a and b in order that

- December 3rd 2009, 10:12 PMCaptainBlack
- December 4th 2009, 02:19 PMzorroCould u please explain me this a little more
- December 5th 2009, 01:24 AMCaptainBlack
- December 7th 2009, 12:24 AMzorroSir i am not that brilliant to replace sin and cos with series expansion
- December 7th 2009, 02:32 AMmr fantastic
You will find the required series for sin x and cos x here: Taylor series - Wikipedia, the free encyclopedia

Now apply the advice given in post #4. - December 7th 2009, 02:57 PMzorroIs this correct
- December 7th 2009, 08:05 PMCaptainBlack
- December 8th 2009, 12:56 AMmr fantastic
I'll just add that the equation can be re-written as , which may be easier to work with ....

- December 8th 2009, 01:47 AMzorroIs the answer correct ?
- December 8th 2009, 01:52 AMmr fantastic
Does your answer satisfy

1 + a - b = 0 .... (1)

3a + b = -6 .... (2)

You should know how to solve simultaneous equations at the level you're apparently studying at. Personally, I'd just add equations (1) and (2) and solve for . Then I'd substitute my value for into (1) and solve for . - December 22nd 2009, 07:51 PMzorroTrying the L'Hospital rule
- December 22nd 2009, 11:03 PMCaptainBlack
- December 23rd 2009, 01:01 AMzorroI did get u
- December 23rd 2009, 01:56 AMCaptainBlack