find the value ofcos(-2070)
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cos(-∅)=cos∅
so cos(-2070)=cos(2070)
cos (1800+270)
=cos(10π +270)
=cos(5(2π) +270)
=cos(270)
=cos(180+90)
=. - cos(90)
= -(0)=0
letitbex87:
thank u
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