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16-08-2016
Mathematics

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If sin(t) > 0 and tan(t) < 0 then cos(t)

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16-08-2016

Hello,

tan (t)<0
==> sin (t) /cos (t)<0
==>1 / cos (t)<0 [since sin (t) ≠0, dividing by sin (t) ]
==> cos (t) <0

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