Answer
The statement does not make sense.
Work Step by Step
The statement talks about a point t on the unit circle:
$\sin t=-\frac{\sqrt{10}}{2}$
The round-off value of $-\frac{\sqrt{10}}{2}$ is $-1.59$, which is out of the range of the sine function. Therefore, the point t is not on the unit circle. Hence, the statement is false.
