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$\cos \left( - 240 ^ { \circ } \right)$ A) $- \frac { 1 } { 2 }$

Question 214

Multiple Choice

$\cos \left( - 240 ^ { \circ } \right)$

A) $- \frac { 1 } { 2 }$
B) $- \frac { \sqrt { 2 } } { 2 }$
C) $\frac { \sqrt { 3 } } { 2 }$
D) $- \frac { \sqrt { 3 } } { 2 }$

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