Math, asked by letitbex87, 11 months ago

find the value ofcos(-2070)​

Answers

Answered by apurvaa200297
7

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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