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Trigonometry

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Cotangent for $(9,2)$

TRIG-EL82PV

Find the cotangent of the angle formed between the positive $x$-axis and the line segment from the origin that contains the point $(9, 2)$.

A

$\cfrac { 9 }{ 2 }$

B

$\cfrac { 2 }{ 9 }$

C

$\cfrac { \sqrt { 85 } }{ 9 }$

D

$\cfrac { 9\sqrt { 85 } }{ 85 }$

E

$\cfrac { 2\sqrt { 85 } }{ 85 }$