The circle with a radius of one unit is partitioned into twelve equal arcs, where each arc corresponds to specific t-values. Determine the value of the trigonometric function at the given real number t using the (x,y) coordinates in the diagram or specify that the expression is undefined.

sec(7π/6)

Determine the exact value of the given function.

cos (5π/4)

Determine the value of the given trigonometric circular function with the help of a calculator. Round the answer to four decimal places.

csc (- 11.8637)

Considering the interval [0, π/2], find the approximate value of x. Express your answer in four decimal places.

sec x = 1.2937

A point $P\left(-\frac{11}{61},\frac{60}{61}\right)$ is plotted on the unit circle for a certain angle $\theta$. Determine the values of the trigonometric functions $\sin\theta$, $\cos\theta$, $\tan\theta$, $\cot\theta$, $\sec\theta$, and $\csc\theta$ corresponding to this point.

The circle with a radius of one unit is partitioned into twelve equal arcs, where each arc corresponds to specific $t$-values. Determine the value of the trigonometric function at the given real number $t$ using the $\left(x,y\right)$ coordinates in the diagram or specify that the expression is undefined.

$\sin\frac{7\pi}{6}$

The circle with a radius of one unit is partitioned into twelve equal arcs, where each arc corresponds to specific $t$-values. Determine the value of the trigonometric function at the given real number $t$ using the $\left(x,y\right)$ coordinates in the diagram or specify that the expression is undefined.

$\tan\frac{\pi}{2}$