If coseco-coto =k
find coseco+coto
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we know that
Coseco^2 -coto^2=(coseco+coto)(Coseco-coto)
.:coseco-coto=k. so
cosec^2-coto^2=(coseco+coto)(k)
coseco+coto=(coseco^2-coto^2)/k
.: coseco^2 -coto^2=coto
coseco+coto=coto/k
Answer
hope it will help
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