Final answer:
The length of TV cannot be determined with the information provided; additional context or a diagram is necessary to establish a relationship between the line segments OI, OV, and TV.
Step-by-step explanation:
The question ostensibly refers to a geometry problem involving line segments and possibly trigonometric concepts. However, the provided information is insufficient to determine the length of TV. The given lengths OI and OV are not directly related without additional context or a diagram that illustrates the position of these segments in relation to each other and to TV. In trigonometry, intermediate calculations like the ones mentioned for sine and tangent functions usually require a right triangle, but without a diagram or more information, we cannot establish the relationship between the segments or use trigonometric identities to find the length of TV.