If cos 45° - sec 60° = x, then the value of x is

• A. \(\frac{{\left( {\sqrt 3 - 4} \right)}}{{2\sqrt 3 }}\)
• B. 1
• C. \(\frac{{\left( {1 - 2\sqrt 2 } \right)}}{{\sqrt 2 }}\)
• D. \(\frac{{\left( {\sqrt 3 \; + \;\sqrt 2 } \right)}}{{\sqrt 2 }}\)