cosec/cosecA-1+cosec/cosecA+1=2secsquare A
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cosecA/(coseca-1)+cosec/(cosec+1)
=((cosecA)(cosecA+1)) /(cosecA-1)(cosecA+1) + (cosecA)(cosecA-1) /( cosecA+1 )*(cosecA-1)
=((cosec^2 + cosec)/cot^2) +(( cosec^@2-cosec)/cot^2)
=(2/sin^2)/(cos^2/sin^2)
=2/cos^2
=2 sec^2
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