if 3cotA=4,find the value of cosec^2A+1/cosec^2A-1
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cotA=4/3
sinA=3/5
cosec²A+sin²A-1
=25/9+9/25-1
=481/225
sinA=3/5
cosec²A+sin²A-1
=25/9+9/25-1
=481/225
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