Show that

k$\backslash$pi U $($x$)$k $=|$ cos $\backslash$omega $|$kxk

$1$

Hint: use the following definition $$ the dot product of two Euclidean $($column$)$

vectors x and y is defined byShow that

k$\backslash$pi U $($x$)$k $=|$ cos $\backslash$omega $|$kxk

$1$

Hint: use the following definition $$ the dot product of two Euclidean $($column$)$

vectors x and y is defined by