seca-coseca =0 then seca+coseca =
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secA-cosecA=0
secA=cosecA
therefore A=45 degrees
secA=root2
cosecA=root2
secA+cosecA=2root2
secA=cosecA
therefore A=45 degrees
secA=root2
cosecA=root2
secA+cosecA=2root2
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