plz answer this question...
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x=A cos (wt+7π/4)
=Acos[2πt+(2π-π/4)]
=2cos[2π-(π/4-2πt)]
=2 cos[2πt-π/4]
=Acos[2πt+(2π-π/4)]
=2cos[2π-(π/4-2πt)]
=2 cos[2πt-π/4]
Tamash:
ur welcome
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