Find the Exact Value of the Function $\frac { \sqrt { 3 } } { 2 }$

question 138

Multiple Choice

Find the exact value of the function. Rationalize the denominator if necessary.
-cos (-630°)

• A) 0
• B) \(\frac { \sqrt { 3 } } { 2 }\)
• C) 1
• D) Undefined

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