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cos(690)\cos \left( - 690 ^ { \circ } \right) A) 22\frac { \sqrt { 2 } } { 2 }

Question 207

Multiple Choice

cos(690) \cos \left( - 690 ^ { \circ } \right)


A) 22\frac { \sqrt { 2 } } { 2 }
B) 12\frac { 1 } { 2 }
C) 32\frac { \sqrt { 3 } } { 2 }
D) 3\sqrt { 3 }

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