given sinc(x) = sin(x)/x

show that sinc(x) = cos(x/2)sinc(x/2)

please help

Printable View

- Mar 13th 2011, 04:50 AMmathcoresinc
given sinc(x) = sin(x)/x

show that sinc(x) = cos(x/2)sinc(x/2)

please help - Mar 13th 2011, 05:01 AMislamreply
hello dear

use the identity $\displaystyle sinx=2sin(x/2)cos(x/2)$ - Mar 13th 2011, 05:18 AMmathcore
thank you that makes it so much understandable. i was looking for an identity to bring in cos i got stuck trying to use cos(x-pi/2) but knew that was overcomplicating thing

i dont know why i didnt know that identity but thats all i really needd to figure it out thanks