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Trigonometry

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Moderate

Rectangular to Polar Coordinate, Inverse Tangent

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TRIG-4LBEGU

What is point, $ \left( -\cfrac { 5\sqrt { 2 } }{ 2 } ,\; -\cfrac { 5\sqrt { 2 } }{ 2 } \right) $, written in polar coordinate form?

A

$\left( 5,\; { 225 }^{ ° } \right)$

B

$\left( 5,\; { 45 }^{ ° } \right)$

C

$\left(5 \sqrt { 2 } ,\quad { 225 }^{ ° } \right) $

D

$\left( 5\sqrt { 2 } ,\quad { 45 }^{ ° } \right)$