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Math·Geometry and Trigonometry·Right triangles and trigonometry

easy

Angle $Z$ is a right angle.
The length of side $XY$ is 210.
The length of side $YZ$ is 126.
The length of side $ZX$ is 168. What is the value of $\tan X$ in the triangle shown?

A

3/4

B

4/3

C

3/5

D

4/5