Anybody know the answer?

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1 Answer
Aug 7, 2018

-4sqrt2"metre."42metre.

Explanation:

Given that, x=4cos(pit+pi/4)x=4cos(πt+π4)

:. t=0 rArr x=4cos(pixx0+pi/4)=4cos(pi/4), and,

t=1 rArr x=4cos(pi+pi/4)=-4cos(pi/4).

:.," The required displacement"=-4cos(pi/4)-4cos(pi/4),

=-8cos(pi/4),

=-8/sqrt2,

=-4sqrt2"metre."