If an answer is undefined, input DNE!!!
$\displaystyle {\sin{{\left({0}\right)}}}=$ ;
$\displaystyle {\cos{{\left({0}\right)}}}=$ ;
$\displaystyle {\tan{{\left({0}\right)}}}=$ ;
$\displaystyle {\cot{{\left({0}\right)}}}=$ ;
$\displaystyle {\sec{{\left({0}\right)}}}=$ ;
$\displaystyle {\csc{{\left({0}\right)}}}=$ ;