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Math·Geometry and Trigonometry·Right triangles and trigonometry

easy

In right triangle RST, angle S is a right angle. The length of side RS is $2\sqrt{130}$, the length of side ST is $129$, and the length of side RT is $131$.

What is the value of $\tan R$ in the triangle shown?

A

$\frac{129}{2\sqrt{130}}$

B

$\frac{2\sqrt{130}}{129}$

C

$\frac{131}{2\sqrt{130}}$

D

$\frac{2\sqrt{130}}{131}$