For a periodic motion represented by the equation $y = \sin \omega t + \cos \omega t$ the amplitude of the motion is (1) 1 (2) 0.5 (3) 2 (4) $\sqrt { 2 }$
For a periodic motion represented by the equation $y = \sin \omega t + \cos \omega t$ the amplitude of the motion is\\
(1) 1\\
(2) 0.5\\
(3) 2\\
(4) $\sqrt { 2 }$