Answer:
C) 21/29
Explanation:
The cosine ratio is given by:
cos (θ) = adjacent / hypotenuse, where
- θ is the reference angle.
When angle X is the reference angle:
- Side XY is the adjacent side,
- and side XZ is the hypotenuse.
Since XY is 21 units and XZ is 29 units, cos X = 21/29.