Determine the value of the expression by using the given figure. Rationalize the denominator if necessary.

$\(\sec\)30^{\(\circ\)}$

Determine the value of the expression by using the given figure. Rationalize the denominator if necessary.

$\(\sin\)45^{\(\circ\)}$

Determine the value of the trigonometric function.

$\(\cos\)30^{\(\circ\)}$