Algebra-2

In a right triangle, the cosine (cos) of an angle is defined as the ratio of the length of the side adjacent to the angle to the length of the hypotenuse.

In the given triangle, angle X is the angle for which we need to find the cosine value. The side adjacent to angle X is XY, which has a length of 15, and the hypotenuse is ZX, with a length of 17.

Therefore, the cosine of angle X can be calculated as:

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