http://i45.tinypic.com/r9lfg5.jpg

i found a_n b_n a_0

but i need to replace the sines

like (-1)^n=cos(pi*n)

i dont know how to do it which sines

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- December 25th 2009, 05:58 AMtransgalactichow to replace the sinus..
http://i45.tinypic.com/r9lfg5.jpg

i found a_n b_n a_0

but i need to replace the sines

like (-1)^n=cos(pi*n)

i dont know how to do it which sines - December 25th 2009, 10:55 AMtonio
- December 25th 2009, 07:51 PMBacterius
- December 26th 2009, 06:32 AMCaptainBlack