cotA-1+cosecA
Prove that :
cotA+1-cosecA
cotA + cosech
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Answer:
cotA+cosecA-1/cotA-cosecA+1
=(cosecA+cotA)-(cosec²A-cot²A)/cotA-cosecA+1
=(cosecA+cotA)(1-cosecA+cotA)/cotA-cosecA+1
=cosecA+cotA
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