1. ## sinc

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

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

hello dear
use the identity $sinx=2sin(x/2)cos(x/2)$

3. 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