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Math·Geometry and Trigonometry·Right triangles and trigonometry

easy

Note: Figure not drawn to scale.

In the right triangle shown, what is the value of $\cos A$?

A

$-\frac{1}{43}$

B

$-\frac{1}{22}$

C

$\frac{22}{43}$

D

$\frac{43}{22}$