The displacement of a particle varies according to the relation $x = 4(cos\pi t + sin\pi t).$ The amplitude of the particle is
AIEEE 2003, Easy
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(d) For given relation
Resultant amplitude $ = \sqrt {{4^2} + {4^2}} = 4\sqrt 2 $
Resultant amplitude $ = \sqrt {{4^2} + {4^2}} = 4\sqrt 2 $
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