Please do the last part of the qn "By using the relation sin2x=cos(90-2x), find one of these solutions by calculation."
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Originally Posted by maybeline9216 Please do the last part of the qn "By using the relation sin2x=cos(90-2x), find one of these solutions by calculation." we have then we are told this means that now continue
O.o so easy arh?? thanks
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