Find an Exact Value $\cos 105 ^ { \circ }$ A) $\sqrt { 6 } - \sqrt { 2 }$

question 267

Multiple Choice

Find an exact value.
- $\cos 105 ^ { \circ }$

• A) \(\sqrt { 6 } - \sqrt { 2 }\)
• B) \(\frac { \sqrt { 6 } - \sqrt { 2 } } { 4 }\)
• C) \(\sqrt { 6 } + \sqrt { 2 }\)
• D) \(\frac { - \sqrt { 6 } + \sqrt { 2 } } { 4 }\)

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