Answer
$cos(\frac{\pi} 2) = 0$
$sin(\frac{\pi} 2) = 1$
$tan(\frac{\pi} 2) = undefined$
$csc(\frac{\pi} 2) = 1$
$sec(\frac{\pi} 2) = undefined$
$tan(\frac{\pi} 2) = 0$
Work Step by Step
See Table 1 (Page 410), it contains all the values for the trigonometric functions when $t = \frac{\pi}{2}$.
