What is the maximum value of the function $f ( x ) = \sin x + \sqrt { 7 } \cos x - \sqrt { 2 }$? [2 points] (1) $\sqrt { 2 }$ (2) $\sqrt { 3 }$ (3) 2 (4) $\sqrt { 5 }$ (5) $\sqrt { 6 }$
What is the maximum value of the function $f ( x ) = \sin x + \sqrt { 7 } \cos x - \sqrt { 2 }$? [2 points]\\
(1) $\sqrt { 2 }$\\
(2) $\sqrt { 3 }$\\
(3) 2\\
(4) $\sqrt { 5 }$\\
(5) $\sqrt { 6 }$